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

Journal Article · Thu Nov 07 04:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4829670· OSTI ID:22259302

Dai, Guohong ^[1]; Zhan, Qingfeng; Yang, Huali; Liu, Yiwei; Zhang, Xiaoshan; Zuo, Zhenghu; Chen, Bin; Li, Run-Wei ^[1]

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1. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201 (China)

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.

• OSTI ID: 22259302
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 114; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BENDING
DEPOSITION
DEPOSITS
MAGNETOSTRICTION
POLYCRYSTALS
POLYESTERS
RESIDUAL STRESSES
SUBSTRATES