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Type: Artigo de periódico
Title: Creep-induced Magnetic Anisotropy Of Amorphous Ribbons Studied By Magneto-impedance And Magnetic Resonance
Author: Kraus L.
Medina A.N.
Gandra F.G.
Knobel M.
Haslar V.
Abstract: Longitudinal (LMI) and transversal (TM1) magneto-impedance effects and the ferromagnetic resonance (FMR) were investigated in amorphous Co67Fe4Cr7Si8Bi4 ribbons with hard-ribbon-axis anisotropy induced by stress-annealing. The magnitude of effective anisotropy field HK was controlled by the stress applied during annealing (0 - 800 MPa). The LMI exhibits peaks centered close to ±//k, whereas the TMI shows a broad plateau around H = 0. The in-plane FMR measured on small disks spark-cut from the ribbons exhibit the usual resonance peak at high fields and a more complicated absorption spectrum at low fields, where the samples are not saturated. Generally the low field spectrum is composed of two peaks, the intensity of which depends on the orientation of magnetic field with respect to the ribbon axis. The experimental results are compared with numerical calculations based on the electrodynamic theory of GMI. The behavior of magnetoimpedance and FMR can be explained by fluctuations of local easy axis directions. © 1999 Tram Tech Publications,.
Rights: fechado
Identifier DOI: 
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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