Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3696887
Keywords
compressive strength; gallium alloys; internal stresses; iron alloys; magnetic anisotropy; magnetic hysteresis; magnetic thin films; magnetostriction; metallic thin films; sputter deposition; tensile strength
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Funding
- National Natural Foundation of China [11174302]
- State Key Project of Fundamental Research of China [2012CB933004]
- Zhejiang Natural Science Foundation
- Ningbo Natural Science Foundation
- Chinese Academy of Sciences (CAS)
- Ningbo Science and Technology Innovation Team [2011B82004, 2009B21005]
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We investigated on magnetic properties of magnetostrictive Fe81Ga19 films grown on flexible polyethylene terephthalate (PET) substrates under various mechanical strains. The unstrained Fe81Ga19 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 Fe81Ga19 films. These results provide an alternative way to tune mechanically magnetic properties, which is particularly important for developing flexible magnetoelectronic devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3696887]
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