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Mumetal Growing Temperature Effect on the Exchange Coupling of Cu/mumetal/Al Oxide/Co/Cu Multilayers
Journal of Magnetics, Volume 7, Number 1, 31 Mar 2002, Pages 14-17
Abstract
Magnetic multilayers of a ferromagnetic (FM)/insulator (I)/ferromagnetic (FM) structure have been studied to investigate magnetic exchange coupling between two FM layers. As the Mumetal (Ni77Fe14Mo5Cu4 wt%) growth temperature increases, the grain size and the surface roughness increase simultaneously. The smallest coupling field is obtained at 40℃ where the grain size is larger than that of the 20℃ sample. The exchange coupling field increases again at temperatures higher than 40℃ due to increase in the surface roughness of the Mumetal.
Keywords: exchange coupling field; surface roughness; grain size; boundary
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