期刊
POLYHEDRON
卷 52, 期 -, 页码 1177-1180出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2012.06.049
关键词
Iron; Magnetite; Magnetocaloric effect; Magnetic refrigeration; Cryogenics
资金
- Spanish MINECO [MAT2009-13977-C03, PIE201060I012]
- EPSRC
- Leverhulme Trust (UK)
We study the magnetothermal properties of magnetically isotropic high-spin molecular nanomagnets containing 17 Fe3+ ions per molecule linked via oxide and hydroxide ions, packed in a crystallographic cubic symmetry. Low-temperature magnetization and heat capacity experiments reveal that each molecular unit carries a net spin ground state as large as S = 35/2 and a magnetic anisotropy as small as D = -0.023 K, while no magnetic order, purely driven by dipolar interactions, is to be expected down to very-low temperatures. These characteristics suggest that the Fe-17 molecular nanomagnet can potentially be employed as a sub-Kelvin magnetic refrigerant. (C) 2012 Elsevier Ltd. All rights reserved.
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