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Nanocomposite (Nd,Dy)(Fe,Co,Nb,B)5.5/α-Fe multilayer magnets with high performance.
- Source :
- Journal of Physics D: Applied Physics; Sep2003, Vol. 36 Issue 17, pL63, 4p
- Publication Year :
- 2003
-
Abstract
- The structural and magnetic properties of rare-earth nanocomposite magnets of a (Nd,Dy)(Fe,Co,Nb,B)<subscript>5.5</subscript> single layer and a (Nd,Dy)(Fe,Co,Nb,B)<subscript>5.5</subscript>/α-Fe multilayer prepared by sputtering and heat treatment have been investigated. Incomplete exchange coupling behaviour is observed in the Ti-buffered NdDyFeCoNbB + 40 wt%Fe single layer magnet. After annealing, the laminated nanostructure consisting of mutually dispersed soft and hard phases results in remanence enhancement. The optimum magnetic properties of J<subscript>r</subscript>=1.11 T, μ<subscript>0i</subscript>H<subscript>c</subscript>=0.88 T and (BH)<subscript>max</subscript>=192 kJ m<superscript>-3</superscript> are achieved in the multilayer magnet annealed at 550°C for 30 min. The designed multilayer film with thinner soft magnetic layers may favour the formation of more ideal nanostructures for exchange coupling between soft- and hard-magnetic phases. [ABSTRACT FROM AUTHOR]
- Subjects :
- MAGNETS
RARE earth metals
NANOSTRUCTURES
Subjects
Details
- Language :
- English
- ISSN :
- 00223727
- Volume :
- 36
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Journal of Physics D: Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 10753983
- Full Text :
- https://doi.org/10.1088/0022-3727/36/17/101