The influence of nanocrystalline microstructure on the magnetic properties of a wire shaped ferromagnetic alloy

Author

Gómez-Polo, C. ; Olofinjana, A.O. ; Marin, P. ; Vazquez, Manuel ; Davies, H.A.

Author_Institution

Inst. de Ciencia de Mater., Madrid, Spain

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2673

Lastpage

2675

Abstract

The magnetic properties of nanocrystalline Fe_73.5Cu₁Nb₃Si_13.5B₉ alloy wire are reported. The evolution of the structure and of the magnetic properties of the wire is studied as a function of annealing temperature, T_ann. In the as-cast glassy state, the wires show typical bistable magnetic behavior while, after devitrification to a nanocrystalline structure based on α-FeSi grains of mean diameter ~10 nm (T_ann=550°C), the coercivity and magnetostriction decrease substantially and bistability is lost. The bistability could be recovered on application of a torsional stress. Treatment at T_ann>600°C leads to grain growth and eventually to precipitation of ultrafine boride, resulting in drastic magnetic hardening

Keywords

annealing; boron alloys; coercive force; copper alloys; crystallisation; ferromagnetic properties of substances; grain growth; iron alloys; magnetic hysteresis; magnetic properties of amorphous substances; magnetostriction; melt spinning; metallic glasses; nanostructured materials; niobium alloys; silicon alloys; 20 to 650 C; Fe_73.5Cu₁Nb₃Si_13.5B ₉; amorphous alloy; annealing temperature; as-cast glassy state; bistable magnetic behavior; coercivity; devitrification; grain growth; hysteresis loops; magnetic hardening; magnetic properties; magnetostriction; melt spinning; nanocrystalline microstructure; precipitation; torsional stress; ultrafine boride; wire shaped ferromagnetic alloy; Annealing; Copper alloys; Iron alloys; Magnetic properties; Magnetostriction; Microstructure; Niobium alloys; Silicon alloys; Temperature; Wire;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.280944

Filename

280944