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Critical Behaviour of the Fe3Nd Cluster Glass Phase in Bulk Glassy Nd60Fe30Al10 Hard Magnets

Published online by Cambridge University Press:  17 March 2011

R. J. Ortega-Hertogs ,
A. Inoue  and
K.V. Rao
R. J. Ortega-Hertogs
Affiliation:
Departamento de Física, Universidad Pública de Navarra, E-31006 Pamplona, Spain Department of Materials Science, Royal Inst. of Technology, S-10044 Stockholm, Sweden
A. Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-77, Japan
K.V. Rao
Affiliation:
Department of Materials Science, Royal Inst. of Technology, S-10044 Stockholm, Sweden
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Abstract

The magnetic properties of novel bulk glassy Nd60Fe30Al10 magnets around the transition to the paramagnetic state have been studied in order to understand the magnetic microstructure in these materials. Analyses of the critical behavior of the magnetic isotherms suggest a transition from a low field magnetic state to a ferromagnetic-like state upon the application of high enough magnetic fields. The ferromagnetic-like state is evidenced by a scaling of the magnetization curves with critical exponents λ=1.5(1), β=0.65(5), and TC=465 K. These results are consistent with the predictions for weak random magnetic anisotropy systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L8.1
Copyright
Copyright © Materials Research Society 2001

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