CrPtMn顶钉扎自旋阀材料的交换耦合作用研究

doi:10.3724/SP.J.1077.2013.12666

无机材料学报 ›› 2013, Vol. 28 ›› Issue (9): 977-981.DOI: 10.3724/SP.J.1077.2013.12666 CSTR: 32189.14.SP.J.1077.2013.12666

CrPtMn顶钉扎自旋阀材料的交换耦合作用研究

白茹¹, 钱正洪¹, 李健平^1,2, 孙宇澄^1,2, 朱华辰^1,2, 李领伟¹, 李源¹, 霍德璇¹, 彭英姿¹

(1. 杭州电子科技大学磁电子中心, 杭州310018; 2. 四川大学材料科学与工程学院, 成都610064)

收稿日期:2012-11-02 修回日期:2012-12-28 出版日期:2013-09-20 网络出版日期:2013-08-14
作者简介:白茹(1981-), 女, 博士. E-mail:bairu@hdu.edu.cn
基金资助:
浙江省重大科技专项(2011C11047); 浙江省?“磁电子材料和器件”?高校创新团队(2009[171]); 浙江省重点科技创新团队(2010R50010); 科技部973项目(2011CBA00602)

Exchange Coupling in CrPtMn-based Top-pinning Spin Valves

BAI Ru¹, QIAN Zheng-Hong¹, LI Jian-Ping^1,2, SUN Yu-Cheng^1,2, ZHU Hua-Chen^1,2, LI Ling-Wei¹, LI Yuan¹, HUO De-Xuan¹, PENG Ying-Zi¹

(1. Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou 310018, China; 2. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China)

Received:2012-11-02 Revised:2012-12-28 Published:2013-09-20 Online:2013-08-14
About author:BAI Ru. E-mail:bairu@hdu.edu.cn
Supported by:
Major Science and Technology Special Theme of Zhejiang Province(2011C11047); Innovation Research Team for Spintronic Materials and Devices of Zhejiang Province(2009[171]), Innovation Research Team of Science and Technology Agency of Zhejiang Province(2010R50010); National Program on Key Basic Rasic Research Project(2011CBA00602)

摘要/Abstract

摘要： 反铁磁钉扎层和铁磁被钉扎层之间的交换耦合作用是高性能自旋阀材料研究中的一个关键因素。本工作研究了CrPtMn顶钉扎自旋阀材料中的交换耦合场(H_ex)与薄膜沉积条件以及退火处理之间的关系。研究表明: 沉积后的自旋阀材料中的H_ex大小与CrPtMn钉扎层的溅射工作气压关系不大, H_ex 约为7.96×10³ A/m。然而, 经过240℃退火2 h处理后, H_ex呈现出与CrPtMn沉积时的溅射工作气压相关的特性, 随着溅射工作气压的增加而增大。材料退火后的交换耦合场H_ex的温度特性良好, 室温下约为2.39×10⁴ A/m。Hex随着测试温度的升高而逐渐减小, 交换耦合场消失时的失效温度(blocking temperature)为315℃。

关键词: 交换耦合作用, 自旋阀, 沉积气压, 测试温度

Abstract: The exchange coupling effect between the ferromagnetic pinned layer and antiferromagnetic pinning layer is considered to be one of the key factors for fabricating high performance spin-valves. In this study, the dependence of the exchange coupling field (H_ex) in CrPtMn-based spin valves on the deposition pressure and subsequent anneal treatment has been investigated. It is found that the Hex for the as-deposited spin valves changes little by varying the sputtering pressure during the deposition of the CrPtMn pinning layer, and the Hex value is roughly 7.96×10³ A/m. However, after the as-deposited spin valves are annealed at 240℃ for 2 h, the H_ex correlates and increases with an increase of the sputtering pressure during the CrPtMn deposition. The exchange coupling Hex for annealed spin valves shows good thermal stability with a strength of 2.39×10⁴ A/m at room temperature. The H_ex gradually decreases with increasing temperature, and finally disappears at 315℃ which is its blocking temperature.

Key words: exchange coupling, spin valve, deposition pressure, measurement temperature

中图分类号:

TQ174

白茹, 钱正洪, 李健平, 孙宇澄, 朱华辰, 李领伟, 李源, 霍德璇, 彭英姿. CrPtMn顶钉扎自旋阀材料的交换耦合作用研究[J]. 无机材料学报, 2013, 28(9): 977-981.

BAI Ru, QIAN Zheng-Hong, LI Jian-Ping, SUN Yu-Cheng, ZHU Hua-Chen, LI Ling-Wei, LI Yuan, HUO De-Xuan, PENG Ying-Zi. Exchange Coupling in CrPtMn-based Top-pinning Spin Valves[J]. Journal of Inorganic Materials, 2013, 28(9): 977-981.

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CrPtMn顶钉扎自旋阀材料的交换耦合作用研究

Exchange Coupling in CrPtMn-based Top-pinning Spin Valves

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