MAGNETORESISTANCE IN A GRANULAR FE-MG SYSTEM

Authors
PETTIT K KITA E ARAGA K TASAKI A SALAMON MB
Citation
K. Pettit et al., MAGNETORESISTANCE IN A GRANULAR FE-MG SYSTEM, Journal of applied physics, 75(10), 1994, pp. 6918-6920
Citations number
17
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
6918 - 6920
Database
ISI
SICI code
0021-8979(1994)75:10<6918:MIAGFS>2.0.ZU;2-I
Abstract
We have prepared granular films of Fe (36 at. %)-Mg (64 at. %) and mea sured the magnetization, resistance, and thermopower as a function of the applied magnetic field at temperatures between 300 and 6 K. The as -prepared sample has a magnetoresistance ratio (DELTAR/R(max)) of -6.3 % in a field of 5.5 T at 6 K. The samples were annealed at temperature s between 150-degrees-C and 228-degrees-C for one hour. The MR does no t vary as the square of the magnetization, as predicted by theory. We attribute this to a particle size distribution effect.