Magnetism and magnetoresistance from different origins in Co/ZnO:Al granular films

被引：4
作者：
Quan, Zhiyong [1 ]
Liu, Xia
Song, Zhilin
Xu, Xiaohong [1 ]
机构：
[1] Shanxi Normal Univ, Key Lab Magnet Mol & Magnet Informat Mat, Minist Educ, Linfen 041004, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2016年 / 502卷
基金：
国家高技术研究发展计划(863计划);
关键词：
Granular films; Magnetoresistance; Superparamagnetic; Magnetic particle; CU-CO ALLOYS; GIANT MAGNETORESISTANCE; THIN-FILMS; SYSTEMS; COBALT;
D O I：
10.1016/j.physb.2016.08.039
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Co/ZnO:Al granular films were made on glass substrates by sequential magnetron sputter deposition of ultrathin Co layer and ZnO:Al layer at room temperature. The as-deposited films consist of super paramagnetic Co particles dispersed in ZnO:Al ( 2% Al) semiconductor matrix. Distinguished magnetoresistance effect at room temperature was obtained in the as-deposited films, which obviously reduced after annealing due to the growth of Co particles. The size of important magnetic particles was analyzed by Langevin function for hysteresis loops and magnetoresistance curves at room temperature. It was found that small magnetic particle contribute to magnetoresistance behavior and large particles dominate the room temperature magnetism in Co/ZnO:Al granular films. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：16 / 20
页数：5
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