Mechanisms of High Coercivity in Ni/NiO Composite Films by Post Annealing

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• 出版年：2007
• 作者：J.B.Yi；J.Ding；Mansoor Bin Abdul Jalil；B.H.Liu；S.Thongmee；J.H.Yin；Z.L.Zhao
• 单位1：Department of Materials Science and Engineering
• 出生年：1970
• 语种：中文
• 作者关键词：Ni/NiO composite；post annealing；exchange coupling；enhanced coercivity
• 起始页：858
• 总页数：3
• 刊名：材料科学与工程学报
• 是否内版：否
• 刊频：双月刊
• 创刊时间：1983
• 主管单位：国家教育部
• 主办单位：浙江大学
• 主编：赵新兵
• 地址：杭州浙江大学材料系
• 邮编：310027
• 电子信箱：jmse@ema.zju.edu.cn
• 卷：25
• 期：6
• 期刊索取号：P822.06 448
• 数据库收录：美国CA源期刊；全国中文核心期刊；中国科技论文统计源期刊；中国科学引文数据库来源期刊；美国CSA收录期刊
• 核心期刊：全国中文核心期刊

摘要

A coercivity as large as 2.4 kOe has been achieved in the Ni/NiO composite film after an annealing under a magnetic field of 10 kOe and an O₂ partial pressure of 0.001 torr.The coercivity was attributed to the strong exchange coupling of Ni and NiO.Small grain size of Ni and NiO was observed after the post-annealing.The enhanced coercivity is probably associated with the domain wall pinning by local energy minima，the distribution of Ni and NiO，and the domain structure in the interface of Ni/NiO generated under the presence ofthe magnetic field during the post-annealing.