GIANT MAGNETORESISTANCE AND INDUCED EXCHANGE-ANISOTROPY IN MECHANICALLY ALLOYED CO30AG70

Authors
OUNADJELA K HERR A POINSOT R COEY JMD FAGAN A STADDON CR DANIEL D GREGG JF THOMPSON SM OGRADY K GRIEVES S
Citation
K. Ounadjela et al., GIANT MAGNETORESISTANCE AND INDUCED EXCHANGE-ANISOTROPY IN MECHANICALLY ALLOYED CO30AG70, Journal of applied physics, 75(10), 1994, pp. 6921-6923
Citations number
15
Categorie Soggetti
Physics, Applied
Journal title
Journal of applied physics → ACNP
ISSN journal
00218979
Volume
75
Issue
10
Year of publication
1994
Part
2B
Pages
6921 - 6923
Database
ISI
SICI code
0021-8979(1994)75:10<6921:GMAIEI>2.0.ZU;2-4
Abstract
Giant magnetoresistance of 7.7% at 5 K is observed in bulk mechanicall y alloyed Co30Ag70. Our recently defined delta(DELTArho/rho) technique used to determine the predominant interactions within the system indi cated that negative interactions dominate between the particles. Excha nge anisotropy and metastable magnetization processes characterized by large Barkhausen jumps are observed at low temperatures on a small vo lume of the sample.