Spectroscopic investigation of elastic and magnetoelastic properties of CoFeB thin films

Magneto-stress coupling has been studied in Co20Fe60B20 thin films of varying thicknesses (10, 20 and 250 nm) deposited onto flexible substrate. It has been investigated by measuring the magnetic resonance under uniaxial (tensile or compressive) applied stresses in situ. The benchmark state, in term...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2016-04, Vol.49 (14), p.145003-145008
Main Authors: Gueye, M, Zighem, F, Belmeguenai, M, Gabor, M S, Tiusan, C, Faurie, D
Format: Article
Language:English
Subjects:
Compressive properties
Elastic constants
ferromagnetic resonance
flexible systems
Light scattering
Magnetic properties
Magnetic resonance
magnetoelastic anisotropy
Stresses
Substrates
Thin films
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Summary:Magneto-stress coupling has been studied in Co20Fe60B20 thin films of varying thicknesses (10, 20 and 250 nm) deposited onto flexible substrate. It has been investigated by measuring the magnetic resonance under uniaxial (tensile or compressive) applied stresses in situ. The benchmark state, in terms of elastic and magnetic properties, was studied by combining Brillouin light scattering experiments and magnetic resonance experiments on flat samples. The deduced parameters are thickness-independent and close to the ones obtained using rigid substrates. A large uniaxial anisotropy proportional to the applied uniaxial stress is found, which is well fitted by considering an isotropic saturation magnetostriction coefficient. Finally, the angular dependence of the resonance field with in-plane biaxial stresses is probed and explained using a simple analytical model.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/49/14/145003