New features of the coercivity in exchange-coupled Ni81Fe19/CoO bilayers | |
Cai, JW ; Lai, WY | |
刊名 | CHINESE PHYSICS LETTERS
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2001 | |
卷号 | 18期号:12页码:1651 |
关键词 | FERROMAGNETIC-FILMS DEPENDENCE ANISOTROPY ASYMMETRY FIELD MODEL |
ISSN号 | 0256-307X |
通讯作者 | Cai, JW (reprint author), Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China. |
中文摘要 | The coercivity behaviour of the Ni81Fe19 film exchange-coupled with an antiferromagnetic CoO underlayer has been investigated systematically. It has been found that the coercivity is greatly enhanced not only in the easy axis direction but also in the hard axis direction when the temperature is below the Neel temperature of CoO. Also, the thickness dependence of coercivity at low temperature follows the scaling relation as 1/t(NiFe)(alpha), with alpha = 2.5 at the hard axis, which is quite in contrast with the case of the easy axis, i.e. alpha = 1.5, predicted theoretically and verified experimentally previously. The increase of the temperature leads to the decrease of the coercivity at both the easy and hard axes, but the scaling relations are held except the narrow region just below the Neel temperature of CoO, at which the coercivity varies as 1/t(NiFe)(alpha) with alpha = 1.0 for both the easy and hard axes. Based upon Hoffmann's ripple theory and Malozemoff's random field model, a simple interpretation of the experiment Endings is presented. |
收录类别 | SCI |
语种 | 英语 |
公开日期 | 2013-09-24 |
内容类型 | 期刊论文 |
源URL | [http://ir.iphy.ac.cn/handle/311004/49843] ![]() |
专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
推荐引用方式 GB/T 7714 | Cai, JW,Lai, WY. New features of the coercivity in exchange-coupled Ni81Fe19/CoO bilayers[J]. CHINESE PHYSICS LETTERS,2001,18(12):1651. |
APA | Cai, JW,&Lai, WY.(2001).New features of the coercivity in exchange-coupled Ni81Fe19/CoO bilayers.CHINESE PHYSICS LETTERS,18(12),1651. |
MLA | Cai, JW,et al."New features of the coercivity in exchange-coupled Ni81Fe19/CoO bilayers".CHINESE PHYSICS LETTERS 18.12(2001):1651. |
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