Exchange Coupling in CrPtMn-based Top-pinning Spin Valves

doi:10.3724/SP.J.1077.2013.12666

Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (9): 977-981.DOI: 10.3724/SP.J.1077.2013.12666

• Research Paper • Previous Articles Next Articles

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)

Abstract

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

CLC Number:

TQ174

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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Exchange Coupling in CrPtMn-based Top-pinning Spin Valves

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