Large magnetocaloric effect at Verwey point in nanocrystalline Fe₃O₄ thin films

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• 作者：Murtaza Bohra^a ; ^c ; ^{murtazaphy@gmail.com} ; S.C. Sahoo^b ; ^c
• 关键词：Fe3O4 ; Magnetocaloric effect ; Verwey transition
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：30 March 2017
• 年：2017
• 卷：699
• 期：Complete
• 页码：1118-1121
• 全文大小：1117 K
• 卷排序：699

文摘

Large magnetocaloric effect has been observed in nanocrystalline Fe3O4 thin films. Maximum entropy change ΔS = 2–12 J/kg K occurred around Verwey transition at 120 K. Magnitude of ΔS is strongly dependent on post thermal treatment on Fe3O4 thin films. This results opens new perspective for NEMS/MEMS devices like cooler on chips.