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利用被钉扎层调控自旋阀的磁电阻值

Tuning MR of Spin Valve with Pinned Layer

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【作者】 高晓平宋玉哲韩根亮张彪刘肃

【Author】 GAO Xiao-ping;SONG Yu-zhe;HAN Gen-liang;ZHANG Biao;LIU Su;School of Physical Science and Technology,Lanzhou University;Institute of Sensor Technology,Gansu Academy of Sciences;

【机构】 兰州大学物理科学与技术学院甘肃省科学院传感技术研究所

【摘要】 利用高真空直流磁控溅射仪,在玻璃衬底上制备了结构为"Glass/Ta(6nm)/NiFe(6nm)/CoFe(1nm)/Cu(3nm)/CoFe(t nm)/IrMn(11nm)/Ta(6nm)"的自旋阀.研究了被钉扎层CoFe的厚度t对自旋阀磁性能的影响,当t为7.5nm时自旋阀主要性能达到最佳,并且在外加磁场4 000Oe下,270℃保温3h退火处理后,自旋阀的GMR值进一步达到5.5%,自由层矫顽力为3Oe,交换偏置场为130Oe.通过以上的优化方案,可以研制出高磁电阻率、低矫顽力和大交换偏置场的自旋阀.

【Abstract】 The spin valve with Glass/Ta(6nm)/NiFe(6nm)/CoFe(1nm)/Cu(3nm)/CoFe(tnm)/IrMn(11nm)/Ta(6nm)was made on glass substrate by using high vacuum DC magnetron sputtering equipment.The influence of t(thickness of the pinned layer CoFe)on the magnetic properties of the spin valve was investigated and the performance of the valve was found to be optimum when t was 7.5nm.After being annealed at 270℃for 3hours in a magnetic field with 4 000Oe,the GMR of the valve increased to 5.5%,the coercivity reduced to 3Oe and the exchange bias field was 130Oe.By this optimal method,the spin valve with high MR,small coercivity and high exchange bias field can be obtained.

【关键词】 自旋阀被钉扎层磁电阻值退火
【Key words】 Spin valvePinned layerMagnetoelectric resistanceAnneal
【基金】 甘肃省科学院青年科技创新基金项目计划(2012QN-07);甘肃省科学院应用研究与开发计划(2013JK-01);甘肃省科学院应用研究与开发计划(2013JK-02)
  • 【文献出处】 甘肃科学学报 ,Journal of Gansu Sciences , 编辑部邮箱 ,2014年03期
  • 【分类号】O484.43
  • 【被引频次】4
  • 【下载频次】61
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