UNSPECIFIED. (2004) Thermal stability and saturation magnetization of a new series of amorphous Fe80-xCoxP14B6 (20 <= x <= 40) alloys. MATERIALS LETTERS, 58 (24). pp. 2988-2992. ISSN 0167-577X

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Abstract

A series of new Fe80-xCoxP14B6 (x = 20, 25, 30, 32, 35, 40) glasses has been prepared by melt-spinning technique. The FeCo-based glasses crystallize via one stage eutectic reaction into a mixture of a-Fe (bcc) solid solution and a b.c.-tetragonal Fe3P-like phase at temperatures approx. 50 K higher than the Fe80-xNixP14B6 metallic glasses. The compositional dependence of the crystallization temperatures at constant rate heating of the FeCo-based glasses has a minimum at x = 30 that correlates well with the values of the apparent activation energy of crystallization derived from the Kissinger analysis. The as-quenched Fe80-xCoxP14B6 ribbons within the range examined have superior saturation magnetization in comparison with that of the commercial Fe40Ni40P14B6 glass, for example the maximum value of the saturation magnetization M-s estimated from vibrating sample magnetometer measurements is as high as 153 emu/g (about 1.415 T, for a density of 7.42 g/cm(3)) for the Fe48Co32P14B6 alloy. (C) 2004 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics
Journal or Publication Title:	MATERIALS LETTERS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0167-577X
Date:	September 2004
Volume:	58
Number:	24
Number of Pages:	5
Page Range:	pp. 2988-2992
Identification Number:	10.1016/j.matlet.2004.05.023
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/8092

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