Title

Reinvestigation of the intrinsic magnetic properties of (Fe1-xCox)(2)B alloys and crystallization behavior of ribbons

Publication Date

7-19-2020

Department

Physics and Astronomy; Materials Science and Engineering; Ames Laboratory

Campus Units

Materials Science and Engineering, Physics and Astronomy, Ames Laboratory

OSTI ID+

1650016

Report Number

IS-J 10276

DOI

10.1016/j.jmmm.2020.167214

Journal Title

Journal of Magnetism and Magnetic Materials

Volume Number

513

First Page

167214

Abstract

New determination of the magnetic anisotropy from single crystals of (Fe1-xCox)(2)B alloys are presented. The anomalous temperature dependence of the anisotropy constant is discussed using the standard Callen-Callen theory, which is shown to be insufficient to explain the experimental results. A more material specific study using first-principles calculations with disordered moments approach gives a much more consistent interpretation of the experimental data. Since the intrinsic properties of the alloys with x = 0.3 - 0.35 are promising for permanent magnets applications, initial investigation of the extrinsic properties are described, in particular the crystallization of melt spun ribbons with Cu, Al, and Ti additions. Previous attempts at developing a significant hysteresis have been unsuccessful in this system. Our melt-spinning experiment indicates that this system shows rapid crystallization.

DOE Contract Number(s)

AC02-07CH11358; DMR-1609776

Language

en

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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