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No.1(pp.1-23)

Home > Issues > Volume 7 (2002) > No.1(pp.1-23)

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

Y.W. Lee*

(Department of Materials Engineering, Chungnam National University), T.H. Lee(Department of Materials Engineering, Chungnam National University), C.G. Kim(Department of Materials Engineering, Chungnam National University), C.O. Kim(Department of Materials Engineering, Chungnam National University), T.S. Yoon(ReCAMM, Chungnam National University), Y.H. Lee(Department of Metallurgical Engineering, Chungnam National University)

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

DOI:

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