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
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2007年 / 68卷 / 10期
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.
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页码：1836 / 1840
页数：5
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