Synthesis and characterization of room-temperature ferromagnetism in Fe- and Ni-co-doped In2O3

被引:39
作者
Li, Xing
Xia, Changtai [1 ]
Pei, Guangqing
He, Xiaoli
机构
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[3] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
[4] Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanostruct, Hefei 230031, Peoples R China
基金
中国国家自然科学基金;
关键词
magnetic materials; sol-gel growth; EXAFS; magnetic properties;
D O I
10.1016/j.jpcs.2007.05.019
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Observation of room-temperature ferromagnetisin in Fe- and Ni-co-doped In2O3 samples (In0.9Fe0.1-xNix)(2)O-3 (0 <= x <= 0.1) prepared by citric acid sol-gel auto-igniting method is reported. All of the samples with intermediate x values are ferromagnetic at roomtemperature. The highest saturation magnetization (0.453 mu B/Fe + Ni ions) moment is reached in the sample with x = 0.04. The highest solubility of Fe and Ni ions in the In2O3 lattice is around 10 and 4 at%, respectively. The 10 at% Fe-doped sample is found to be weakly ferromagnetic, while the 10at% Ni-doped sample is paramagnetic. Extensive structure including Extended X-ray absorption fine structure (EXAFS), magnetic and magneto-transport including Hall effects studies on the samples indicate the observed ferromagnetism is intrinsic rather than from the secondary impurity phases. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1836 / 1840
页数:5
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