Room temperature ferromagnetism in conducting α-(In1-xFex)2O3 alloy films

被引：11
|
作者：
Akaiwa, K. [1 ,2 ]
Kaneko, K. [1 ]
Fujita, S. [1 ]
Chikoidze, E. [3 ]
Dumont, Y. [3 ]
机构：
[1] Kyoto Univ, Photon & Elect Sci & Engn Ctr, Kyoto 6158520, Japan
[2] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6158520, Japan
[3] Univ Versailles St Quentin Yvelines, CNRS, Grp Etud Matiere Condensee GEMaC, F-78035 Versailles, France
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 06期
基金：
日本学术振兴会;
关键词：
THIN-FILMS; OXIDE;
D O I：
10.1063/1.4908050
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have studied electronic transport and magnetic properties of alpha-(In1-xFex)(2)O-3 alloy films. Temperature dependence of resistivity of the films showed semiconducting behavior of conductivity. Room temperature ferromagnetism was observed. Relatively high coercive fields indicated that observed ferromagnetism in alpha-(In1-xFex)(2)O-3 films were not arisen from magnetic metallic iron nano-precipitates. Remanence measurement revealed the Curie temperature of 520K and 620K for alpha-(In0.52Fe0.48)(2)O-3 and alpha-(In0.23Fe0.77)(2)O-3 films, corresponding to a weakening of superexchange interactions in these alloys (with less magnetic iron cations) with respect to canted antiferromagnet alpha-Fe2O3. Nevertheless, Curie temperatures remain much higher than 300 K, and semiconducting behavior with low activation energy in resistivity for middle composition alloy, exhibiting combined multi-functionality of room ferromagnetism and semiconducting properties, in corundum alloys such as alpha-(Ga1-xFex)(2)O-3 or alpha-Fe2-xTixO3. (C) 2015 AIP Publishing LLC.
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页数：4
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