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Title: Controllable strain-induced uniaxial anisotropy of Fe{sub 81}Ga{sub 19} films deposited on flexible bowed-substrates

Abstract

We propose a convenient method to induce a uniaxial anisotropy in magnetostrictive Fe{sub 81}Ga{sub 19} films grown on flexible polyethylene terephthalate (PET) substrates by bending the substrate prior to deposition. A tensile/compressive stress is induced in the Fe{sub 81}Ga{sub 19} films when PET substrates are shaped from concave/convex to flat after deposition. The stressed Fe{sub 81}Ga{sub 19} films exhibit a significant uniaxial magnetic anisotropy due to the internal stress arising from changes in shape of PET substrates. The easy axis is along the tensile stress direction and the coercive field along easy axis is increased with increasing the internal tensile stress. The remanence of hard axis is decreased with increasing the compressive stress, while the coercive field is almost unchanged. A modified Stoner-Wohlfarth model with considering the distribution of easy axes in polycrystalline films is used to account for the magnetic properties tuned by the strain-controlled magnetoelastic anisotropy in flexible Fe{sub 81}Ga{sub 19} films. Our investigations provide a convenient way to induce uniaxial magnetic anisotropy, which is particularly important for fabricating flexible magnetoelectronic devices.

Authors:
 [1];  [2];  [2]; ; ; ; ; ; ;  [1];  [2]
  1. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22259302
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 17; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; BENDING; DEPOSITION; DEPOSITS; MAGNETOSTRICTION; POLYCRYSTALS; POLYESTERS; RESIDUAL STRESSES; SUBSTRATES

Citation Formats

Dai, Guohong, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, School of Science, Nanchang University, Nanchang 330031, Zhan, Qingfeng, E-mail: zhanqf@nimte.ac.cn, Yang, Huali, Liu, Yiwei, Zhang, Xiaoshan, Zuo, Zhenghu, Chen, Bin, Li, Run-Wei, E-mail: runweili@nimte.ac.cn, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201. Controllable strain-induced uniaxial anisotropy of Fe{sub 81}Ga{sub 19} films deposited on flexible bowed-substrates. United States: N. p., 2013. Web. doi:10.1063/1.4829670.
Dai, Guohong, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, School of Science, Nanchang University, Nanchang 330031, Zhan, Qingfeng, E-mail: zhanqf@nimte.ac.cn, Yang, Huali, Liu, Yiwei, Zhang, Xiaoshan, Zuo, Zhenghu, Chen, Bin, Li, Run-Wei, E-mail: runweili@nimte.ac.cn, & Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201. Controllable strain-induced uniaxial anisotropy of Fe{sub 81}Ga{sub 19} films deposited on flexible bowed-substrates. United States. doi:10.1063/1.4829670.
Dai, Guohong, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, School of Science, Nanchang University, Nanchang 330031, Zhan, Qingfeng, E-mail: zhanqf@nimte.ac.cn, Yang, Huali, Liu, Yiwei, Zhang, Xiaoshan, Zuo, Zhenghu, Chen, Bin, Li, Run-Wei, E-mail: runweili@nimte.ac.cn, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201. 2013. "Controllable strain-induced uniaxial anisotropy of Fe{sub 81}Ga{sub 19} films deposited on flexible bowed-substrates". United States. doi:10.1063/1.4829670.
@article{osti_22259302,
title = {Controllable strain-induced uniaxial anisotropy of Fe{sub 81}Ga{sub 19} films deposited on flexible bowed-substrates},
author = {Dai, Guohong and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201 and School of Science, Nanchang University, Nanchang 330031 and Zhan, Qingfeng, E-mail: zhanqf@nimte.ac.cn and Yang, Huali and Liu, Yiwei and Zhang, Xiaoshan and Zuo, Zhenghu and Chen, Bin and Li, Run-Wei, E-mail: runweili@nimte.ac.cn and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201},
abstractNote = {We propose a convenient method to induce a uniaxial anisotropy in magnetostrictive Fe{sub 81}Ga{sub 19} films grown on flexible polyethylene terephthalate (PET) substrates by bending the substrate prior to deposition. A tensile/compressive stress is induced in the Fe{sub 81}Ga{sub 19} films when PET substrates are shaped from concave/convex to flat after deposition. The stressed Fe{sub 81}Ga{sub 19} films exhibit a significant uniaxial magnetic anisotropy due to the internal stress arising from changes in shape of PET substrates. The easy axis is along the tensile stress direction and the coercive field along easy axis is increased with increasing the internal tensile stress. The remanence of hard axis is decreased with increasing the compressive stress, while the coercive field is almost unchanged. A modified Stoner-Wohlfarth model with considering the distribution of easy axes in polycrystalline films is used to account for the magnetic properties tuned by the strain-controlled magnetoelastic anisotropy in flexible Fe{sub 81}Ga{sub 19} films. Our investigations provide a convenient way to induce uniaxial magnetic anisotropy, which is particularly important for fabricating flexible magnetoelectronic devices.},
doi = {10.1063/1.4829670},
journal = {Journal of Applied Physics},
number = 17,
volume = 114,
place = {United States},
year = 2013,
month =
}
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