Spin-enhanced magnetocaloric effect in molecular nanomagnets

M  Evangelisti; A  Candini; A  Ghirri; M  Affronte; E K  Brechin; E J L  McInnes

doi:10.1063/1.2010604

Spin-enhanced magnetocaloric effect in molecular nanomagnets

M Evangelisti, A Candini, A Ghirri, M Affronte, E K Brechin, E J L McInnes

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Abstract

An unusually large magnetocaloric effect for the temperature region below 10 K is found for the Fe-14 molecular nanomagnet. This is to large extent caused by its extremely large spin S ground state combined with an excess of entropy arising from the presence of low-lying excited S states. We also show that the highly symmetric Fe-14 cluster core, resulting in small cluster magnetic anisotropy, enables the occurrence of long-range antiferromagnetic order below T-N=1.87 K. (C) 2005 American Institute of Physics.

Original language	English
Article number	072504
Pages (from-to)	-
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	7
DOIs	https://doi.org/10.1063/1.2010604
Publication status	Published - 15 Aug 2005

Keywords

CLUSTERS
MAGNETS

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abstract = "An unusually large magnetocaloric effect for the temperature region below 10 K is found for the Fe-14 molecular nanomagnet. This is to large extent caused by its extremely large spin S ground state combined with an excess of entropy arising from the presence of low-lying excited S states. We also show that the highly symmetric Fe-14 cluster core, resulting in small cluster magnetic anisotropy, enables the occurrence of long-range antiferromagnetic order below T-N=1.87 K. (C) 2005 American Institute of Physics.",

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AU - Candini, A

AU - Ghirri, A

AU - Affronte, M

AU - Brechin, E K

AU - McInnes, E J L

PY - 2005/8/15

Y1 - 2005/8/15

N2 - An unusually large magnetocaloric effect for the temperature region below 10 K is found for the Fe-14 molecular nanomagnet. This is to large extent caused by its extremely large spin S ground state combined with an excess of entropy arising from the presence of low-lying excited S states. We also show that the highly symmetric Fe-14 cluster core, resulting in small cluster magnetic anisotropy, enables the occurrence of long-range antiferromagnetic order below T-N=1.87 K. (C) 2005 American Institute of Physics.

AB - An unusually large magnetocaloric effect for the temperature region below 10 K is found for the Fe-14 molecular nanomagnet. This is to large extent caused by its extremely large spin S ground state combined with an excess of entropy arising from the presence of low-lying excited S states. We also show that the highly symmetric Fe-14 cluster core, resulting in small cluster magnetic anisotropy, enables the occurrence of long-range antiferromagnetic order below T-N=1.87 K. (C) 2005 American Institute of Physics.

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KW - MAGNETS

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DO - 10.1063/1.2010604

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Spin-enhanced magnetocaloric effect in molecular nanomagnets

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Keywords

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