CoFe/Cu多層膜のGMR特性

概要

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Giant magnetoresistance (GMR) of multilayer have a potential application in post spon-valve heads, because these have a larger magnetoresistance (MR) ratio thab spinvalves and they will be usefull in the hard disk drive (HDD) heads.In this study, we investigate the dependence of the GMR properties an nano-structure of Co_<0.9>Fe_<0.1>/Cu multilayers on the maderials, thickness of the buffer layer and the thickness of the Cu and CoFe layers.A maximum MR ratio of 20.1% and the resistivity change, Δρ, of 4.5μΩcm were obtained at a Cu thickness of 21.6Å which is the second antiferromagnetic coupling peak of the interlayer coupling oscillation.Large MR ratio is obtained for the film which has small XRD peak intensity of Cu(111).The orientation of Cu(111) in multilayers was dependent on both the material and the thickness of the buffer layer.The reason of this behavior is an that an increase in the roughness of the CoFe/Cu interface, detected by X-ray reflectometry, causes an increase in the area of the interface.
社団法人日本磁気学会の論文
1998-04-15