Title :
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
fDate :
9/1/2000 12:00:00 AM
Abstract :
The effect of annealing (at 300-700°C) on coercivity of finemet-type Fe72.3+xCu1Nb3.1Si14.5-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, Hc, and annealing temperature, Tann, corresponding to such maximum of Hc 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; Fe72.3+xCu1Nb3.1Si14.5-x B9.1; Fe72.3CuNb3.1Si14.5B9.1 ; 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;
Journal_Title :
Magnetics, IEEE Transactions on
