Influence of annealing on the magnetic properties and magneto-impedance response in Fe84Zr7B8Cu1 ribbons

Autor:	K.Y. He, Hong-wei Zhang, B. G. Shen, J. He, Hui-qun Guo
Rok vydání:	2001
Předmět:	Materials science Magnetoresistance Condensed matter physics Annealing (metallurgy) Mechanical Engineering Nucleation Giant magnetoresistance Coercivity Condensed Matter Physics Amorphous solid Magnetization Devitrification Nuclear magnetic resonance Mechanics of Materials General Materials Science
Zdroj:	Materials Science and Engineering: A. :988-991
ISSN:	0921-5093
DOI:	10.1016/s0921-5093(00)01612-9
Popis:	X-ray diffraction and magnetic measurements have been used to study the structural and magnetic changes produced by annealing Fe84Zr7B8Cu1 amorphous ribbons at the temperature range 723-923 K for 20 min. Heat treatment causes a devitrification of the amorphous phase giving rise to nucleation and growth of b.c.c. alpha -Fe phase. Structural and compositional changes result ill the amelioration of soft magnetic properties. The giant magneto-impedance (GMI) ratio DeltaZ/Z (DeltaZ/Z = (Z(H-max))/Z(H-max)) is enhanced with the devitrification and reaches the maximal value of about 260% at frequency f = 6.5 MHz for the ribbon annealed at 873 R for 20 min, The dependence of strong GMI response on frequency and applied field is related to the superior soft magnetic properties of the annealed samples. The sensitive drop of transverse permeability is the source of MI effect through skin effect. (C) 2001 Elsevier Science B.V. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::96e276f1bfbbb2eb7aaacb2f4df696c8 https://doi.org/10.1016/s0921-5093(00)01612-9 Zobrazit plný text záznamu Full Text from ScienceDirect