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Mannan Ali

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Journal of Magnetism and Magnetic Materials 191 (1999) 339-344


Induced anisotropy, magnetic domain structure and magnetoimpedance effect in CoFeB amorphous thin films

D. García^a, J. L. Muñoz^a, G. Kurlyandskaya^a, M. Vázquez^a, M. Ali^b, M.R.J. Gibbs<sup>b

a</sup>Instituto de Magnetismo Aplicado. UCM-RENFE and Instituto de Ciencia de Materiales, CSIC. P.O. Box 155, 28230 Las Rozas, Madrid, Spain
^bDepartment of Physics, University of Sheffield, Sheffield, S3 7RH (U.K.)



Abstract
CoFeB amorphous thin films have been prepared by radio frequency magnetron sputtering. The objective of the work has been to obtain very soft thin films, and to correlate their domain structure with the induced anisotropy and giant magneto-impedance (GMI) features. Tailored anisotropies were induced by either growth under stress, or by post- deposition annealing in the presence of a magnetic field. In certain cases these induced anisotropies give rise to significant GMI effect at a frequency, 5 MHz, relatively low for thin films.



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