Revisión

 

Nanocrystalline hard magnetic alloys

 

J. I. Betancourt R.

 

Instituto de Investigaciones en Materiales, U.N.A.M. Apdo. Post. 70-360, México D.F. 04510, México.

 

Recibido el 3 de diciembre de 2001.
Aceptado el 19 de abril de 2002.

 

Abstract

The recent progress on the understanding of the physical properties of nanocrystalline hard magnetic alloys, based on Rare earth-Iron-Boron (REFeB) compositions, are reviewed. The discussion includes: fundamental properties, crystal structure, coercivity mechanism, micromagnetic studies and recent applications of these functional alloys. Prospective of future developments are also included.

Keywords: Nanocrystalline magnetic alloys; permanent magnets.

 

Resumen

La presente revisión trata sobre las propiedades físicas y avances recientes en aleaciones magnéticas duras nanocristalinas, basadas en la composición tierra-rara-hierro-boro (TRFeB). Se incluyen en la discusión los siguientes aspectos: propiedades físicas fundamentales, estructura cristalina, mecanismos de coercividad, estudios de micromagnetismo y aplicaciones recientes de estas aleaciones funcionales. Se menciona también hacia donde se enfoca la investigación actual en este tema.

Descriptores: Aleaciones magnéticas nanocristalinas; imanes permanentes.

 

PACS: 75.50.Ww; 75.50.Tt

 

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