Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime
Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site ani...
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| Autor*in: |
Haldar, Sumit [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Rechteinformationen: |
Nutzungsrecht: © 2017 Informa UK Limited, trading as Taylor & Francis Group 2017 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Molecular physics - London : Taylor & Francis, 1958, 115(2017), 21-22, Seite 2849 |
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| Übergeordnetes Werk: |
volume:115 ; year:2017 ; number:21-22 ; pages:2849 |
| Links: |
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| DOI / URN: |
10.1080/00268976.2017.1346832 |
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| 520 | |a Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. | ||
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10.1080/00268976.2017.1346832 doi PQ20171228 (DE-627)OLC1997582813 (DE-599)GBVOLC1997582813 (PRQ)i1131-6ab5965c7c4ec15624dc3eeb37e7bb1b27df9f0b67ff7e10801e64b8a4dc61c40 (KEY)0082863720170000115002102849modellingmagneticanisotropyofsinglechainmagnetsind DE-627 ger DE-627 rakwb eng 570 530 DE-600 Haldar, Sumit verfasserin aut Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. Nutzungsrecht: © 2017 Informa UK Limited, trading as Taylor & Francis Group 2017 model Hamiltonian anisotropy Single-chain magnets Chains Anisotropy Magnets Manifolds Onsite Magnetic anisotropy Magnetism Raghunathan, Rajamani oth Sutter, Jean-Pascal oth Ramasesha, S oth Enthalten in Molecular physics London : Taylor & Francis, 1958 115(2017), 21-22, Seite 2849 (DE-627)129602140 (DE-600)241517-3 (DE-576)015095878 0026-8976 nnns volume:115 year:2017 number:21-22 pages:2849 http://dx.doi.org/10.1080/00268976.2017.1346832 Volltext http://www.tandfonline.com/doi/abs/10.1080/00268976.2017.1346832 https://search.proquest.com/docview/1958202511 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 AR 115 2017 21-22 2849 |
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10.1080/00268976.2017.1346832 doi PQ20171228 (DE-627)OLC1997582813 (DE-599)GBVOLC1997582813 (PRQ)i1131-6ab5965c7c4ec15624dc3eeb37e7bb1b27df9f0b67ff7e10801e64b8a4dc61c40 (KEY)0082863720170000115002102849modellingmagneticanisotropyofsinglechainmagnetsind DE-627 ger DE-627 rakwb eng 570 530 DE-600 Haldar, Sumit verfasserin aut Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. Nutzungsrecht: © 2017 Informa UK Limited, trading as Taylor & Francis Group 2017 model Hamiltonian anisotropy Single-chain magnets Chains Anisotropy Magnets Manifolds Onsite Magnetic anisotropy Magnetism Raghunathan, Rajamani oth Sutter, Jean-Pascal oth Ramasesha, S oth Enthalten in Molecular physics London : Taylor & Francis, 1958 115(2017), 21-22, Seite 2849 (DE-627)129602140 (DE-600)241517-3 (DE-576)015095878 0026-8976 nnns volume:115 year:2017 number:21-22 pages:2849 http://dx.doi.org/10.1080/00268976.2017.1346832 Volltext http://www.tandfonline.com/doi/abs/10.1080/00268976.2017.1346832 https://search.proquest.com/docview/1958202511 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 AR 115 2017 21-22 2849 |
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10.1080/00268976.2017.1346832 doi PQ20171228 (DE-627)OLC1997582813 (DE-599)GBVOLC1997582813 (PRQ)i1131-6ab5965c7c4ec15624dc3eeb37e7bb1b27df9f0b67ff7e10801e64b8a4dc61c40 (KEY)0082863720170000115002102849modellingmagneticanisotropyofsinglechainmagnetsind DE-627 ger DE-627 rakwb eng 570 530 DE-600 Haldar, Sumit verfasserin aut Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. Nutzungsrecht: © 2017 Informa UK Limited, trading as Taylor & Francis Group 2017 model Hamiltonian anisotropy Single-chain magnets Chains Anisotropy Magnets Manifolds Onsite Magnetic anisotropy Magnetism Raghunathan, Rajamani oth Sutter, Jean-Pascal oth Ramasesha, S oth Enthalten in Molecular physics London : Taylor & Francis, 1958 115(2017), 21-22, Seite 2849 (DE-627)129602140 (DE-600)241517-3 (DE-576)015095878 0026-8976 nnns volume:115 year:2017 number:21-22 pages:2849 http://dx.doi.org/10.1080/00268976.2017.1346832 Volltext http://www.tandfonline.com/doi/abs/10.1080/00268976.2017.1346832 https://search.proquest.com/docview/1958202511 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 AR 115 2017 21-22 2849 |
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10.1080/00268976.2017.1346832 doi PQ20171228 (DE-627)OLC1997582813 (DE-599)GBVOLC1997582813 (PRQ)i1131-6ab5965c7c4ec15624dc3eeb37e7bb1b27df9f0b67ff7e10801e64b8a4dc61c40 (KEY)0082863720170000115002102849modellingmagneticanisotropyofsinglechainmagnetsind DE-627 ger DE-627 rakwb eng 570 530 DE-600 Haldar, Sumit verfasserin aut Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. Nutzungsrecht: © 2017 Informa UK Limited, trading as Taylor & Francis Group 2017 model Hamiltonian anisotropy Single-chain magnets Chains Anisotropy Magnets Manifolds Onsite Magnetic anisotropy Magnetism Raghunathan, Rajamani oth Sutter, Jean-Pascal oth Ramasesha, S oth Enthalten in Molecular physics London : Taylor & Francis, 1958 115(2017), 21-22, Seite 2849 (DE-627)129602140 (DE-600)241517-3 (DE-576)015095878 0026-8976 nnns volume:115 year:2017 number:21-22 pages:2849 http://dx.doi.org/10.1080/00268976.2017.1346832 Volltext http://www.tandfonline.com/doi/abs/10.1080/00268976.2017.1346832 https://search.proquest.com/docview/1958202511 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 AR 115 2017 21-22 2849 |
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10.1080/00268976.2017.1346832 doi PQ20171228 (DE-627)OLC1997582813 (DE-599)GBVOLC1997582813 (PRQ)i1131-6ab5965c7c4ec15624dc3eeb37e7bb1b27df9f0b67ff7e10801e64b8a4dc61c40 (KEY)0082863720170000115002102849modellingmagneticanisotropyofsinglechainmagnetsind DE-627 ger DE-627 rakwb eng 570 530 DE-600 Haldar, Sumit verfasserin aut Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. Nutzungsrecht: © 2017 Informa UK Limited, trading as Taylor & Francis Group 2017 model Hamiltonian anisotropy Single-chain magnets Chains Anisotropy Magnets Manifolds Onsite Magnetic anisotropy Magnetism Raghunathan, Rajamani oth Sutter, Jean-Pascal oth Ramasesha, S oth Enthalten in Molecular physics London : Taylor & Francis, 1958 115(2017), 21-22, Seite 2849 (DE-627)129602140 (DE-600)241517-3 (DE-576)015095878 0026-8976 nnns volume:115 year:2017 number:21-22 pages:2849 http://dx.doi.org/10.1080/00268976.2017.1346832 Volltext http://www.tandfonline.com/doi/abs/10.1080/00268976.2017.1346832 https://search.proquest.com/docview/1958202511 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_59 GBV_ILN_70 AR 115 2017 21-22 2849 |
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Enthalten in Molecular physics 115(2017), 21-22, Seite 2849 volume:115 year:2017 number:21-22 pages:2849 |
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Haldar, Sumit @@aut@@ Raghunathan, Rajamani @@oth@@ Sutter, Jean-Pascal @@oth@@ Ramasesha, S @@oth@@ |
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modelling magnetic anisotropy of single-chain magnets in |d/j| ≥ 1 regime |
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Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime |
| abstract |
Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. |
| abstractGer |
Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. |
| abstract_unstemmed |
Single-molecule magnets (SMMs) with single-ion anisotropies comparable to exchange interactions J between spins have recently been synthesised. Here, we provide theoretical insights into the magnetism of such systems. We study spin chains with site-spins, s = 1, 3/2 and 2 and strength of on-site anisotropy comparable to the exchange constants between the spins. We find that large on-site anisotropies lead to crossing of the states with different M S values in the same spin manifold to which they belong in the absence of anisotropy. When on-site anisotropy is increased further, we also find that the M S states of the higher energy spin states descend below the M S states of the ground spin manifold. Giant spin in this limit is no longer conserved and describing the axial and rhombic anisotropies of the molecule, D M and E M , respectively, is not possible. However, the giant spin of the low-lying large M S states is very nearly an integer and, using this spin value, it is possible to construct an effective spin-Hamiltonian and compute the molecular magnetic anisotropy constants D M and E M . We report effect of finite sizes, rotations of site anisotropies and chain dimerisation on the effective anisotropy of the spin chains. |
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Modelling magnetic anisotropy of single-chain magnets in |d/J| ≥ 1 regime |
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