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Magnetic, Mossbauer and magnetostrictive studies of amorphous Tb(Fe0.55Co0.45)1.5 films

Danh, T.M. and Duc, N.H. and Thanh, H. N. and Teillet, J. (2000) Magnetic, Mossbauer and magnetostrictive studies of amorphous Tb(Fe0.55Co0.45)1.5 films. Journal of Applied Physics, 87 (10). pp. 7208-7212.

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The Tb(Fe0.55Co0.45)1.5 films were fabricated by rf magnetron sputtering from a composite target. Samples were investigated by means of x-ray diffraction, vibrating sample magnetometer, conversion electron Mössbauer spectra, and magnetostriction measurements. The as-deposited film is an amorphous alloy with a perpendicular magnetic anisotropy and an intrinsic magnetostriction λ=1080×10-6 in an applied field of 0.7 T. In this state, it was determined that the hyperfine field Bhf=23.5 T and the cone-angle between the Fe moment direction and the film-normal direction β=12°. After annealing in the temperature range of TA=250–450 °C the amorphous structure still remained, however the anisotropy was changed to a parallel one. The soft magnetostrictive behavior has also been improved by these heat treatments: the parallel magnetostriction λ||=465×10-6 was almost developed in low applied fields of less than 0.1 T and, especially, a huge magnetostrictive susceptibility χλ=dλ||/d(μ0H)=1.8×10-2 T-1 was obtained at μ0H=15 mT. © 2000 American Institute of Physics.

Item Type: Article
Uncontrolled Keywords: Mossbauer effect;X-ray diffraction;amorphous magnetic materials;annealing;cobalt alloys;hyperfine interactions;iron alloys;magnetic moments;magnetic thin films;magnetostriction;metallic thin films;noncrystalline structure;perpendicular magnetic anisotropy;sputtered coatings;terbium alloys;6143Dq;6855-a;7170Jp;7530Cr;7530Gw;7550Kj;7570Ak;7580+q;7680+y;8105Bx;8140Gh;8140Rs
Subjects: ?? Nano ??
Engineering Physics
Divisions: Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User: Prof. Xuan-Tu Tran
Date Deposited: 27 Mar 2013 06:27
Last Modified: 01 Apr 2013 06:59

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