Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes

doi:10.1088/1674-1056/25/7/077307

中国物理B ›› 2016, Vol. 25 ›› Issue (7): 77307-077307.doi: 10.1088/1674-1056/25/7/077307

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes

Luping Liu(刘鲁萍), Qingfeng Zhan(詹清峰), Xin Rong(荣欣), Huali Yang(杨华礼), Yali Xie(谢亚丽), Xiaohua Tan(谭晓华), Run-wei Li(李润伟)

1 Institute of Materials Science, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
2 Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
3 Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

收稿日期:2016-02-25 修回日期:2016-03-21 出版日期:2016-07-05 发布日期:2016-07-05
通讯作者: Qingfeng Zhan, Yali Xie, Xiaohua Tan E-mail:zhanqf@nimte.ac.cn;tanxiaohua123@shu.edu.cn;runweili@nimte.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11374312, 51401230, 51522105, and 51471101 ) and the Ningbo Science and Technology Innovation Team, China (Grant No. 2015B11001).

Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes

Luping Liu(刘鲁萍)^1,2,3, Qingfeng Zhan(詹清峰)^2,3, Xin Rong(荣欣)^2,3, Huali Yang(杨华礼)^2,3, Yali Xie(谢亚丽)^2,3, Xiaohua Tan(谭晓华)¹, Run-wei Li(李润伟)^2,3

1 Institute of Materials Science, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
2 Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
3 Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Received:2016-02-25 Revised:2016-03-21 Online:2016-07-05 Published:2016-07-05
Contact: Qingfeng Zhan, Yali Xie, Xiaohua Tan E-mail:zhanqf@nimte.ac.cn;tanxiaohua123@shu.edu.cn;runweili@nimte.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11374312, 51401230, 51522105, and 51471101 ) and the Ningbo Science and Technology Innovation Team, China (Grant No. 2015B11001).

摘要/Abstract

摘要：

We fabricated flexible spin valves on polyvinylidene fluoride (PVDF) membranes and investigated the influence of thermal deformation of substrates on the giant magnetoresistance (GMR) behaviors. The large magnetostrictive Fe₈₁Ga₁₉ (FeGa) alloy and the low magnetostrictive Fe₁₉Ni₈₁ (FeNi) alloy were selected as the free and pinned ferromagnetic layers. In addition, the exchange bias (EB) of the pinned layer was set along the different thermal deformation axes α₃₁ or α₃₂ of PVDF. The GMR ratio of the reference spin valves grown on Si intrinsically increases with lowering temperature due to an enhancement of spontaneous magnetization. For flexible spin valves, when decreasing temperature, the anisotropic thermal deformation of PVDF produces a uniaxial anisotropy along the α₃₂ direction, which changes the distribution of magnetic domains. As a result, the GMR ratio at low temperature for spin valves with EB||α₃₂ becomes close to that on Si, but for spin valves with EB||α₃₁ is far away from that on Si. This thermal effect on GMR behaviors is more significant when using magnetostrictive FeGa as the free layer.

关键词: giant magnetoresistance, flexible spin-valves, thermal expansion

Abstract:

Key words: giant magnetoresistance, flexible spin-valves, thermal expansion

中图分类号: (Magnetoresistance)

73.43.Qt

75.30.Gw (Magnetic anisotropy) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)

刘鲁萍, 詹清峰, 荣欣, 杨华礼, 谢亚丽, 谭晓华, 李润伟. Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes[J]. 中国物理B, 2016, 25(7): 77307-077307.

Luping Liu(刘鲁萍), Qingfeng Zhan(詹清峰), Xin Rong(荣欣), Huali Yang(杨华礼), Yali Xie(谢亚丽), Xiaohua Tan(谭晓华), Run-wei Li(李润伟). Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes[J]. Chin. Phys. B, 2016, 25(7): 77307-077307.

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Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes

Effect of thermal deformation on giant magnetoresistance of flexible spin valves grown on polyvinylidene fluoride membranes

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