Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<

High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality li...
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Autor*in:	Abanoub R. N. Hanna [verfasserIn] Mahmoud Abdel-Hafiez [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	crystal growth unconventional superconductor lower critical field

Übergeordnetes Werk:	In: Crystals - MDPI AG, 2011, 10(2020), 5, p 362
Übergeordnetes Werk:	volume:10 ; year:2020 ; number:5, p 362

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/cryst10050362

Katalog-ID:	DOAJ03007438X

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spelling	10.3390/cryst10050362 doi (DE-627)DOAJ03007438X (DE-599)DOAJ9fc9bff067cf48f891add632ba933d69 DE-627 ger DE-627 rakwb eng QD901-999 Abanoub R. N. Hanna verfasserin aut Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub< 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity. crystal growth unconventional superconductor lower critical field Crystallography Mahmoud Abdel-Hafiez verfasserin aut In Crystals MDPI AG, 2011 10(2020), 5, p 362 (DE-627)718303067 (DE-600)2661516-2 20734352 nnns volume:10 year:2020 number:5, p 362 https://doi.org/10.3390/cryst10050362 kostenfrei https://doaj.org/article/9fc9bff067cf48f891add632ba933d69 kostenfrei https://www.mdpi.com/2073-4352/10/5/362 kostenfrei https://doaj.org/toc/2073-4352 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 5, p 362
allfields_unstemmed	10.3390/cryst10050362 doi (DE-627)DOAJ03007438X (DE-599)DOAJ9fc9bff067cf48f891add632ba933d69 DE-627 ger DE-627 rakwb eng QD901-999 Abanoub R. N. Hanna verfasserin aut Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub< 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity. crystal growth unconventional superconductor lower critical field Crystallography Mahmoud Abdel-Hafiez verfasserin aut In Crystals MDPI AG, 2011 10(2020), 5, p 362 (DE-627)718303067 (DE-600)2661516-2 20734352 nnns volume:10 year:2020 number:5, p 362 https://doi.org/10.3390/cryst10050362 kostenfrei https://doaj.org/article/9fc9bff067cf48f891add632ba933d69 kostenfrei https://www.mdpi.com/2073-4352/10/5/362 kostenfrei https://doaj.org/toc/2073-4352 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 5, p 362
allfieldsGer	10.3390/cryst10050362 doi (DE-627)DOAJ03007438X (DE-599)DOAJ9fc9bff067cf48f891add632ba933d69 DE-627 ger DE-627 rakwb eng QD901-999 Abanoub R. N. Hanna verfasserin aut Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub< 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity. crystal growth unconventional superconductor lower critical field Crystallography Mahmoud Abdel-Hafiez verfasserin aut In Crystals MDPI AG, 2011 10(2020), 5, p 362 (DE-627)718303067 (DE-600)2661516-2 20734352 nnns volume:10 year:2020 number:5, p 362 https://doi.org/10.3390/cryst10050362 kostenfrei https://doaj.org/article/9fc9bff067cf48f891add632ba933d69 kostenfrei https://www.mdpi.com/2073-4352/10/5/362 kostenfrei https://doaj.org/toc/2073-4352 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 5, p 362
allfieldsSound	10.3390/cryst10050362 doi (DE-627)DOAJ03007438X (DE-599)DOAJ9fc9bff067cf48f891add632ba933d69 DE-627 ger DE-627 rakwb eng QD901-999 Abanoub R. N. Hanna verfasserin aut Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub< 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity. crystal growth unconventional superconductor lower critical field Crystallography Mahmoud Abdel-Hafiez verfasserin aut In Crystals MDPI AG, 2011 10(2020), 5, p 362 (DE-627)718303067 (DE-600)2661516-2 20734352 nnns volume:10 year:2020 number:5, p 362 https://doi.org/10.3390/cryst10050362 kostenfrei https://doaj.org/article/9fc9bff067cf48f891add632ba933d69 kostenfrei https://www.mdpi.com/2073-4352/10/5/362 kostenfrei https://doaj.org/toc/2073-4352 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2020 5, p 362
language	English
source	In Crystals 10(2020), 5, p 362 volume:10 year:2020 number:5, p 362
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callnumber-first	Q - Science
author	Abanoub R. N. Hanna
spellingShingle	Abanoub R. N. Hanna misc QD901-999 misc crystal growth misc unconventional superconductor misc lower critical field misc Crystallography Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<
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topic_title	QD901-999 Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub< crystal growth unconventional superconductor lower critical field
topic	misc QD901-999 misc crystal growth misc unconventional superconductor misc lower critical field misc Crystallography
topic_unstemmed	misc QD901-999 misc crystal growth misc unconventional superconductor misc lower critical field misc Crystallography
topic_browse	misc QD901-999 misc crystal growth misc unconventional superconductor misc lower critical field misc Crystallography
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title	Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<
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title_full	Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<
author_sort	Abanoub R. N. Hanna
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author_browse	Abanoub R. N. Hanna Mahmoud Abdel-Hafiez
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author-letter	Abanoub R. N. Hanna
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title_sort	single-crystal growth and small anisotropy of the lower critical field in oxypnictides: ndfeaso<sub<1 − <em<x</em<</sub<f<sub<<em<x</em<</sub<
callnumber	QD901-999
title_auth	Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<
abstract	High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity.
abstractGer	High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity.
abstract_unstemmed	High-quality single crystals of the unconventional superconductor NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< were grown. We developed a new optimized flux technique to overcome the difficulties in single-crystal growth and the sample quality limitations of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub<. The normal state of the F-doped samples exhibits simple metallic behavior upon cooling down from room temperature, followed by a sharp superconducting transition. The values of residual resistivity ratio (RRR) is 3.2, 6.4, and 10.3 for <i<x</i< = 0.1, 0.15, and 0.2, respectively. Both the large RRR and the narrow superconducting transition signpost the high quality of the crystals. We have examined the in- and out-of-plane lower critical fields, and the field at which vortices penetrate the sample of NdFeAsO<sub<1 − <i<x</i<</sub<F<sub<<i<x</i<</sub< (<i<x</i< = 0.1). The anisotropy ratio [γ<sub<Hc1</sub< (0)] increased slightly with increasing temperature from 0.8 Tc to Tc. The temperature dependence of the first vortex penetration field was obtained under the static magnetic field, <i<H,</i< parallel to the c- and ab- axis, and pronounced changes in the <i<H<sub<c</sub<</i<<sub<1</sub<(<i<T</i<) curvature were observed, which are attributed to the multi-band superconductivity.
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container_issue	5, p 362
title_short	Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<
url	https://doi.org/10.3390/cryst10050362 https://doaj.org/article/9fc9bff067cf48f891add632ba933d69 https://www.mdpi.com/2073-4352/10/5/362 https://doaj.org/toc/2073-4352
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Single-Crystal Growth and Small Anisotropy of the Lower Critical Field in Oxypnictides: NdFeAsO<sub<1 − <em<x</em<</sub<F<sub<<em<x</em<</sub<

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