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具有垂直各向异性(Pt/Co)_n/FeMn多层膜的交换偏置

Exchange bias with perpendicular anisotropy in (Pt/Co)_n/FeMn multilayers

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【Author】 Zhai Zhong-Hai~ 1)2) Teng Jiao~ 1) Li Bao-He~ 1)3) Wang Li-Jin~ 1) Yu Guang-Hua~ 1) Zhu Feng-Wu~ 1) 1)(Department of Material Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083,China)2)(College of Science, Shenyang Jianzhu University, Shenyang 110168, China)3)(Department of Mathematics and Physics, Beijing Technology and Business University, Beijing 100037, China)

【机构】北京科技大学物理与化学系；北京科技大学物理与化学系北京100083；沈阳建筑大学理学院；沈阳110168；北京100083；北京工商大学数理部；北京100037；

【摘要】采用磁控溅射方法制备了以Pt为缓冲层和保护层的具有垂直各向异性(Pt/Co)n/FeMn多层膜.研究结果表明,多层膜的垂直交换偏置场Hex和反铁磁层厚度的关系与其具有平面各向异性的交换偏置场随反铁磁层厚度变化趋势相近.随着铁磁层调制周期数的增加,垂直交换偏置场Hex相应减小,并且与铁磁层的调制周期数近似成反比关系.(Pt/Co)3/FeMn的垂直交换偏置场Hex已经达到22·3kA/m.为了进一步提高Hex,在Co/FeMn的界面插入Pt层,当Pt层厚度为0·4nm时,Hex达到最大值39·8kA/m.更多还原

【Abstract】 In this paper, we report the observation of exchange bias in (Pt/Co)-n/FeMn multilayer with perpendicular magnetic anisotropy. The samples were deposited on glass substrates by magnetron sputtering and capped with 2?nm thick Pt layer. Our results show that the relation between perpendicular exchange bias H- ex of (Pt/Co)-n/FeMn multilayers and the thickness of antiferromagnetic layer is similar to that in the case of in-plane exchange bias. H- ex is inversely proportional to the number of bilayer repeats. In the case of (Pt/Co)-3/FeMn multilayers, perpendicular exchange bias H- ex reachs 22.3?kA/m. With insertion of 0.4?nm Pt layer between Co layer and FeMn layer, H- ex can reach 39.8?kA/m.更多还原

【关键词】交换偏置；垂直各向异性；多层膜；
【Key words】 exchange bias； perpendicular magnetic anisotropy； multilayer；

【基金】国家自然科学基金(批准号:50471093);北京市自然科学基金(批准号:2052014)资助的课题.

【文献出处】物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2006年04期

【分类号】O484.43
【被引频次】7
【下载频次】270

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