| Co/CoO双层膜的各向异性磁电阻与交换偏置行为研究 |
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| 引用本文： | 付新闻,曹桂新,康保娟,敬超,曹世勋,张金仓.Co/CoO双层膜的各向异性磁电阻与交换偏置行为研究[J].低温物理学报,2010(6). |
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| 作者姓名： | 付新闻 曹桂新 康保娟 敬超 曹世勋 张金仓 |
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| 作者单位： | 上海大学物理系; |
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| 基金项目： | 国家自然科学基金(批准号:10804068、10774097)资助的课题 |
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| 摘 要： | 本文系统研究了Co/CoO双层膜的各向异性磁电阻(AMR)与交换偏置行为,并给出了外加微扰场对交换偏置磁锻炼效应恢复程度影响的实验结果.结果表明磁锻炼效应发生后,施加0.15T的倾斜微扰场可致使铁磁畴分裂进而诱导磁锻炼效应的恢复,揭示磁锻炼效应恢复程度与微扰场的角度有紧密关联.在微扰场作用下FM自旋在两个方向分裂,一部分自旋沿微扰场方向,另一部则被冷却场的AFM自旋钉扎住而沿原来方向不变.当微扰场和冷却场夹角大于30°时,FM畴被分裂,磁锻炼效应开始恢复,表明一个磁畴内的铁磁自旋偏离夹角最大为30°,而磁锻炼效应发生后,部分AFM自旋偏离冷却场方向的角度则小于30°,实验结果与相应的理论计算结果一致.此外,恢复程度随微扰场角度的增加而增加,最大恢复程度时角度为90°.同时,磁锻炼效应的恢复增加了交换偏置值,为器件设计提供理论支持,在自旋电子学基础和应用研究方面具有重要的指导意义.
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| 关 键 词： | Co/CoO双层膜 各向异性磁电阻 交换偏置 磁锻炼效应 |
EFFECT OF PERTUABATION FIELD ANGLE ON UNTRAINED STATE AFTER TRAINING EFFECT APPEARANCE |
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| FU Xin-wen CAO Gui-xin KANG Bao-juan JING Chao CAO Shi-xun ZHANG Jin-cang.EFFECT OF PERTUABATION FIELD ANGLE ON UNTRAINED STATE AFTER TRAINING EFFECT APPEARANCE[J].Chinese Journal of Low Temperature Physics,2010(6). |
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| Authors: | FU Xin-wen CAO Gui-xin KANG Bao-juan JING Chao CAO Shi-xun ZHANG Jin-cang |
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| Institution: | FU Xin-wen CAO Gui-xin KANG Bao-juan JING Chao CAO Shi-xun ZHANG Jin-cang Department of Physics,Shanghai University,Shanghai 200444 |
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| Abstract: | In this paper,the behavior of anisotropic magnetoresisance(AMR) and effect exchange bias were systemically studied for CoO/Co bilayers.The effect of external perturbation field on untrained state was also given.The results show that 0.15T perturbation field could destroy domain to induce untrained state after training effect appearance.It evidence that the closely relation of untrained state and perturbation field.The result reveal that FM spin separated into two parts under perturbation field: one part wil... |
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| Keywords: | CoO/Co bilayers anisotropic magnetoresisance exchange bias training effect |
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