Umadevi, K and Talapatra, A and Arout Chelvane, J and Palit, M and Mohanty, Jyoti Ranjan and Jayalakshmi, V
(2018)
Influence of substrate temperature driven magnetic anisotropy on the magnetostrictive behavior of Tb Fe Co thin films.
Journal of Magnetism and Magnetic Materials, 466.
pp. 333-340.
ISSN 0304-8853
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Abstract
Tb–Fe–Co thin films were grown at different substrate temperatures on Si 〈1 0 0〉 substrates to engineer their structure, microstructure, magnetic anisotropy and magnetostriction. Structural studies showed an amorphous structure for the as-deposited film. However, films deposited at higher substrate temperatures exhibited formation of Tb2(Fe,Co)17 and Fe–Co phases. Magnetization studies displayed presence of in-plane magnetic anisotropy for all the films. In addition to this, strong out-of-plane magnetic anisotropy co-existing with in-plane component has been observed for the film grown at 400 °C. These observations were further confirmed by the magnetic microscopy studies which showed strong magnetic phase contrast for the film processed at 400 °C. Consequently, the magnetostriction calculated from tip deflection measurements was found to be very small for this film. A maximum magnetostriction of about 300 ppm has been realized for the film grown at 550 °C owing to the presence of in-plane magnetic anisotropy, enhancement in crystallization and relaxation of stresses.
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