Room-temperature coercivity enhancement in mechanically alloyed antiferromagnetic-ferromagnetic powders

Authors
Sort, J Nogues, J Amils, X Surinach, S Munoz, JS Baro, MD
Citation
J. Sort et al., Room-temperature coercivity enhancement in mechanically alloyed antiferromagnetic-ferromagnetic powders, APPL PHYS L, 75(20), 1999, pp. 3177-3179
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
75
Issue
20
Year of publication
1999
Pages
3177 - 3179
Database
ISI
SICI code
0003-6951(19991115)75:20<3177:RCEIMA>2.0.ZU;2-B
Abstract
The coercivity, H-C, and squareness of Co powders have been enhanced at roo m temperature by mechanically alloying them with antiferromagnetic powders with Neel temperature, T-N, above room temperature. The enhancement is maxi mum after field annealing above T-N. The existence of loop shifts and the d ependence of H-C on the annealing and measuring temperatures indicate that exchange bias effects are responsible for this behavior. (C) 1999 American Institute of Physics. [S0003-6951(99)05246-8].