Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 320, Issue 3-4, Pages 510-514Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2007.07.010
Keywords
GMI; amorphous ribbon; CoFeB
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Through a proper application of a model proposed by Kuzminski and Lachowicz, giant magneto-impedance (GMI) data obtained on as- prepared and Joule heated CoFeB amorphous ribbons have been analyzed in order to obtain detailed information about how the electromagnetic penetration depth and transverse relative magnetic permeability evolve as a function of a longitudinal magnetic field and annealing conditions. When transverse permeability is enhanced ( near the beginning of the crystallization process), impedance values reach a maximum, while when transverse magnetic permeability variations with the application of a longitudinal magnetic field are maximized, the best GMI response of the material is obtained. (c) 2007 Elsevier B.V. All rights reserved.
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