Mechanically tunable magnetic properties of Fe{sub 81}Ga{sub 19} films grown on flexible substrates

Journal Article · Mon Mar 19 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3696887· OSTI ID:22025480

Guohong, Dai ^[1]; Qingfeng, Zhan; Yiwei, Liu; Huali, Yang; Xiaoshan, Zhang; Bin, Chen; Runwei, Li ^[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 investigated on magnetic properties of magnetostrictive Fe{sub 81}Ga{sub 19} films grown on flexible polyethylene terephthalate (PET) substrates under various mechanical strains. The unstrained Fe{sub 81}Ga{sub 19} films exhibit a significant uniaxial magnetic anisotropy due to a residual stress in PET substrates. It was found that the squareness of hysteresis loops can be tuned by an application of strains, inward/compressive or outward/tensile bending of the films. A modified Stoner-Wohlfarth model with considering a distribution of easy axes in polycrystalline films was developed to account for the mechanically tunable magnetic properties in flexible Fe{sub 81}Ga{sub 19} films. These results provide an alternative way to tune mechanically magnetic properties, which is particularly important for developing flexible magnetoelectronic devices.

• OSTI ID: 22025480
• Journal Information: Applied Physics Letters, Vol. 100, Issue 12; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BENDING
COMPRESSION STRENGTH
GALLIUM ALLOYS
HYSTERESIS
IRON ALLOYS
MAGNETOSTRICTION
POLYCRYSTALS
POLYESTERS
RESIDUAL STRESSES
SPUTTERING
STRAINS
SUBSTRATES
TENSILE PROPERTIES
THIN FILMS