High coercivity of partially devitrified glass-coated finemet microwires: effect of geometry and thermal treatment

Author

Gonzalez, J. ; Zhukov, A. ; Zhukova, V. ; Cobeño, A.F. ; Blanco, J.M. ; de Arellano-Lopez, A.R. ; Lopez-Pombero, S. ; Martinez-Fernandez, J. ; Larin, V. ; Torcunov, A.

Author_Institution

Dept. Fisica de Mater., Univ. Politecnica de Valencia, Spain

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3015

Lastpage

3017

Abstract

The effect of annealing (at 300-700°C) on coercivity of finemet-type Fe_72.3+xCu₁Nb_3.1Si_14.5-xB _9.1(x=0 and 1.1) microwires has been studied. Strong magnetic hardening without deterioration of mechanical properties has been found at annealing temperatures around 500°C for one of the sample (x=0). The exact value of coercivity, H_c, and annealing temperature, T_ann, corresponding to such maximum of H_c depend on the sample diameter and the glass coating thickness (ratio ρ=d/D). Observed dependencies have been interpreted in terms of effect of magnetoelastic anisotropy in partially devitrified two-phase samples

Keywords

annealing; boron alloys; coercive force; copper alloys; ferromagnetic materials; glass; iron alloys; magnetic anisotropy; magnetoelastic effects; niobium alloys; permanent magnets; silicon alloys; 300 to 700 C; Fe_72.3+xCu₁Nb_3.1Si_14.5-xB_9.1; Fe_72.3CuNb_3.1Si_14.5B_9.1; annealing; annealing temperatures; coercivity; geometry; glass coating thickness; high coercivity; magnetic hardening; magnetoelastic anisotropy; mechanical properties; partially devitrified glass-coated finemet microwires; partially devitrified two-phase samples; thermal treatment; Annealing; Coatings; Coercive force; Glass; Iron; Magnetic anisotropy; Mechanical factors; Niobium; Perpendicular magnetic anisotropy; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908660

Filename

908660