Enhancement of ferromagnetic properties of NiO:Fe thin film by Li doping

被引：24
作者：
Lin, Yuan-Hua [1 ]
Zhao, Rongjuan
Nan, Ce-Wen
Ying, Minghao
Kobayashi, M.
Ooki, Y.
Fujimori, A.
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[2] Univ Tokyo, Dept Phys, Kashiwa, Chiba 2778561, Japan
[3] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 20期
基金：
日本学术振兴会; 中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2388130
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Li and Fe codoped NiO thin films (LixNi0.98-xFe0.02O, x=0-0.05) were obtained by a sol-gel spin-coating method on silicon substrates. Phase composition and microstructure analysis indicated that the film samples contained 20-30 nm sized NiO particles. With increasing Li-doping concentration, the current density of the films increased due to the increase of hole carriers. Magnetization measurements revealed that all the thin films showed room-temperature ferromagnetic properties and could be enhanced by Li doping, which should be due to the fact that hole doping makes ferromagnetic coupling interactions between the hole carriers and localized Fe 3d spins more efficient. (c) 2006 American Institute of Physics.
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