Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment
The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other p...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Panwar, Sunil [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2015transfer abstract |
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| Schlagwörter: |
Magnetic field dependent electrical resistivity |
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| Umfang: |
5 |
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| Übergeordnetes Werk: |
Enthalten in: Optimism in prolonged grief and depression following loss: A three-wave longitudinal study - Boelen, Paul A. ELSEVIER, 2015transfer abstract, an international journal, New York, NY [u.a.] |
|---|---|
| Übergeordnetes Werk: |
volume:223 ; year:2015 ; pages:32-36 ; extent:5 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.ssc.2015.09.001 |
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| Katalog-ID: |
ELV034314776 |
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| 245 | 1 | 0 | |a Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment |
| 264 | 1 | |c 2015transfer abstract | |
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| 520 | |a The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. | ||
| 520 | |a The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. | ||
| 650 | 7 | |a Magnetic field dependent electrical resistivity |2 Elsevier | |
| 650 | 7 | |a CMR manganites |2 Elsevier | |
| 650 | 7 | |a Magnetic field dependent thermoelectric power |2 Elsevier | |
| 650 | 7 | |a Magnetoresistance |2 Elsevier | |
| 700 | 1 | |a Kumar, Vijay |4 oth | |
| 700 | 1 | |a Chaudhary, Amit |4 oth | |
| 700 | 1 | |a Kumar, Rajendra |4 oth | |
| 700 | 1 | |a Singh, Ishwar |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Boelen, Paul A. ELSEVIER |t Optimism in prolonged grief and depression following loss: A three-wave longitudinal study |d 2015transfer abstract |d an international journal |g New York, NY [u.a.] |w (DE-627)ELV018237444 |
| 773 | 1 | 8 | |g volume:223 |g year:2015 |g pages:32-36 |g extent:5 |
| 856 | 4 | 0 | |u https://doi.org/10.1016/j.ssc.2015.09.001 |3 Volltext |
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10.1016/j.ssc.2015.09.001 doi GBVA2015001000027.pica (DE-627)ELV034314776 (ELSEVIER)S0038-1098(15)00315-4 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 Panwar, Sunil verfasserin aut Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment 2015transfer abstract 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. Magnetic field dependent electrical resistivity Elsevier CMR manganites Elsevier Magnetic field dependent thermoelectric power Elsevier Magnetoresistance Elsevier Kumar, Vijay oth Chaudhary, Amit oth Kumar, Rajendra oth Singh, Ishwar oth Enthalten in Elsevier Science Boelen, Paul A. ELSEVIER Optimism in prolonged grief and depression following loss: A three-wave longitudinal study 2015transfer abstract an international journal New York, NY [u.a.] (DE-627)ELV018237444 volume:223 year:2015 pages:32-36 extent:5 https://doi.org/10.1016/j.ssc.2015.09.001 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_40 AR 223 2015 32-36 5 045F 540 |
| spelling |
10.1016/j.ssc.2015.09.001 doi GBVA2015001000027.pica (DE-627)ELV034314776 (ELSEVIER)S0038-1098(15)00315-4 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 Panwar, Sunil verfasserin aut Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment 2015transfer abstract 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. Magnetic field dependent electrical resistivity Elsevier CMR manganites Elsevier Magnetic field dependent thermoelectric power Elsevier Magnetoresistance Elsevier Kumar, Vijay oth Chaudhary, Amit oth Kumar, Rajendra oth Singh, Ishwar oth Enthalten in Elsevier Science Boelen, Paul A. ELSEVIER Optimism in prolonged grief and depression following loss: A three-wave longitudinal study 2015transfer abstract an international journal New York, NY [u.a.] (DE-627)ELV018237444 volume:223 year:2015 pages:32-36 extent:5 https://doi.org/10.1016/j.ssc.2015.09.001 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_40 AR 223 2015 32-36 5 045F 540 |
| allfields_unstemmed |
10.1016/j.ssc.2015.09.001 doi GBVA2015001000027.pica (DE-627)ELV034314776 (ELSEVIER)S0038-1098(15)00315-4 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 Panwar, Sunil verfasserin aut Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment 2015transfer abstract 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. Magnetic field dependent electrical resistivity Elsevier CMR manganites Elsevier Magnetic field dependent thermoelectric power Elsevier Magnetoresistance Elsevier Kumar, Vijay oth Chaudhary, Amit oth Kumar, Rajendra oth Singh, Ishwar oth Enthalten in Elsevier Science Boelen, Paul A. ELSEVIER Optimism in prolonged grief and depression following loss: A three-wave longitudinal study 2015transfer abstract an international journal New York, NY [u.a.] (DE-627)ELV018237444 volume:223 year:2015 pages:32-36 extent:5 https://doi.org/10.1016/j.ssc.2015.09.001 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_40 AR 223 2015 32-36 5 045F 540 |
| allfieldsGer |
10.1016/j.ssc.2015.09.001 doi GBVA2015001000027.pica (DE-627)ELV034314776 (ELSEVIER)S0038-1098(15)00315-4 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 Panwar, Sunil verfasserin aut Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment 2015transfer abstract 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. Magnetic field dependent electrical resistivity Elsevier CMR manganites Elsevier Magnetic field dependent thermoelectric power Elsevier Magnetoresistance Elsevier Kumar, Vijay oth Chaudhary, Amit oth Kumar, Rajendra oth Singh, Ishwar oth Enthalten in Elsevier Science Boelen, Paul A. ELSEVIER Optimism in prolonged grief and depression following loss: A three-wave longitudinal study 2015transfer abstract an international journal New York, NY [u.a.] (DE-627)ELV018237444 volume:223 year:2015 pages:32-36 extent:5 https://doi.org/10.1016/j.ssc.2015.09.001 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_40 AR 223 2015 32-36 5 045F 540 |
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10.1016/j.ssc.2015.09.001 doi GBVA2015001000027.pica (DE-627)ELV034314776 (ELSEVIER)S0038-1098(15)00315-4 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 Panwar, Sunil verfasserin aut Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment 2015transfer abstract 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. Magnetic field dependent electrical resistivity Elsevier CMR manganites Elsevier Magnetic field dependent thermoelectric power Elsevier Magnetoresistance Elsevier Kumar, Vijay oth Chaudhary, Amit oth Kumar, Rajendra oth Singh, Ishwar oth Enthalten in Elsevier Science Boelen, Paul A. ELSEVIER Optimism in prolonged grief and depression following loss: A three-wave longitudinal study 2015transfer abstract an international journal New York, NY [u.a.] (DE-627)ELV018237444 volume:223 year:2015 pages:32-36 extent:5 https://doi.org/10.1016/j.ssc.2015.09.001 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_40 AR 223 2015 32-36 5 045F 540 |
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theoretical study of magnetotransport properties of colossal magnetoresistive manganites (re1−x a x mno3): a variational treatment |
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Theoretical study of magnetotransport properties of colossal magnetoresistive manganites (Re1−x A x MnO3): A variational treatment |
| abstract |
The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. |
| abstractGer |
The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. |
| abstract_unstemmed |
The magnetotransport properties like electrical resistivity and Thermoelectric power of rare earth manganites doped with alkaline earths namely Re1−x A x MnO3 (where Re=La, Pr, Nd etc., and A=Ca, Sr, Ba etc.) which exhibit colossal magnetoresistance (CMR), metal–insulator transition and many other poorly understood phenomena, have been studied in this work by means of a Variational method. We have used two band (ℓ-b) model for manganites in the strong electron–lattice Jahn–Teller (JT) coupling regime, an approach similar to the two-fluid models along with (ℓ-b) hybridization. We have already used this Variational method to study the zero field electrical resistivity ρ(T) of doped CMR manganites. In the present study we find that the resistivity decreases with increasing magnetic field and the metal–insulator transition temperature (Tρ ) shifts towards higher temperature region. This may happen because of the delocalized charge carriers, induced by applied magnetic field, decreasing the resistivity which in turn leads to the local ordering of the electron spins. Due to this ordering, the ferromagnetic metallic state might have suppressed the paramagnetic insulating regime resulting in the observed increase in Tρ under applied magnetic field. We have also shown the temperature dependent magneto-resistance (MR) ratio at different magnetic fields. We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. In the external magnetic field, the phonon-drag effect is expected to become weaker so that value of Q(T) reduces. |
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We obtained large MR value at low temperatures. An interesting feature of the Magnetic field dependent thermoelectric power Q(T) is that it rises gradually with decreasing temperatures and a broad peak appears at low temperatures and as the temperature is lowered further, the value of Q(T) drops sharply (i.e. Q→0 as T→0 ), which is suggested to originate from the weak carrier localization effect. 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ELSEVIER</subfield><subfield code="t">Optimism in prolonged grief and depression following loss: A three-wave longitudinal study</subfield><subfield code="d">2015transfer abstract</subfield><subfield code="d">an international journal</subfield><subfield code="g">New York, NY [u.a.]</subfield><subfield code="w">(DE-627)ELV018237444</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:223</subfield><subfield code="g">year:2015</subfield><subfield code="g">pages:32-36</subfield><subfield code="g">extent:5</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.ssc.2015.09.001</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">223</subfield><subfield code="j">2015</subfield><subfield code="h">32-36</subfield><subfield code="g">5</subfield></datafield><datafield tag="953" ind1=" " ind2=" "><subfield code="2">045F</subfield><subfield code="a">540</subfield></datafield></record></collection>
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