Journal of the Physical Society of Japan
Vol.64 No.2, February, 1995 pp.581-587
DOI : 10.1143/JPSJ.64.581

Neutron Diffraction Studies on a Non-Coupled Giant Magnetoresistance System, Co/Cu/NiFe/Cu Multilayer

Nobuyoshi Hosoito, Teruo Ono, Hidefumi Yamamoto*, Teruya Shinjo and Yasuo Endoh1

Institute for Chemical Research, Kyoto University, Uji 611
1Department of Physics, Tohoku University, Sendai 980-77

(Received August 1, 1994)

By polarized neutron diffraction, a long range antiparallel alignment of Co and NiFe(permalloy) layer magnetizations is confirmed in a non-coupled Co(10 Å)/Cu(36 Å)/NiFe(10 Å)/Cu(36 Å) giant magnetoresistance system. A general relationship between the magnetoresistance and the magnetization vectors of the Co and NiFe layers under various magnetic fields and temperatures is experimentally derived. The observed large temperature change in the magnetoresistance ratio is understood with this relationship.

KEYWORDS: neutron diffraction, giant magnetoresistance, non-coupled giant magnetoresistance system, multilayer, antiparallel alignment of magnetizations, magnetization process, coercive field


*Present address: Memory Resarch Laboratory, NEC Corporation, 4-1-1 Miyazaki, Miyamae-ku, Kawasaki 216.

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