TY - JOUR
T1 - Spin-dependent CPP transport properties of semiconductive-oxide/ferromagnet multilayers
AU - Nozaki, Y.
AU - Maeda, Y.
AU - Matsuyama, K.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/2
Y1 - 2002/2
N2 - The spin-dependent CPP (current perpendicular to plane) transport properties in semiconductive-oxide(MOx)/ferromagnet multilayers consisting of CoPt/Co/MOx/Co/MOx/Co/CoPt, where M = Ti, Sn, were investigated by magneto-transport measurement. The XRD patterns reveal that the structures of sputtered MOx films are amorphous or nanocrystalline. The MR ratio of a TiOx-based multilayer (0.43%) was much smaller than that of a SnOx-based one (2.0%) at T = 77 K. As inferred from the shape of MR curves with a large saturation field above 4kOe, suppressed MR change in the TiOx-based multilayer is caused by the interlayer diffusion of Co atoms into the TiOx layer. The same behavior was not observed in the SnOx-based one. The MR ratio was reduced by half on increasing tSnO(x) from 4 to 8 nm. This decrease can be ascribed to the scattering of the spin-polarized electron in the SnOx layer.
AB - The spin-dependent CPP (current perpendicular to plane) transport properties in semiconductive-oxide(MOx)/ferromagnet multilayers consisting of CoPt/Co/MOx/Co/MOx/Co/CoPt, where M = Ti, Sn, were investigated by magneto-transport measurement. The XRD patterns reveal that the structures of sputtered MOx films are amorphous or nanocrystalline. The MR ratio of a TiOx-based multilayer (0.43%) was much smaller than that of a SnOx-based one (2.0%) at T = 77 K. As inferred from the shape of MR curves with a large saturation field above 4kOe, suppressed MR change in the TiOx-based multilayer is caused by the interlayer diffusion of Co atoms into the TiOx layer. The same behavior was not observed in the SnOx-based one. The MR ratio was reduced by half on increasing tSnO(x) from 4 to 8 nm. This decrease can be ascribed to the scattering of the spin-polarized electron in the SnOx layer.
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U2 - 10.1016/S0304-8853(01)00537-6
DO - 10.1016/S0304-8853(01)00537-6
M3 - Article
AN - SCOPUS:0036465336
SN - 0304-8853
VL - 239
SP - 157
EP - 159
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 1-3
ER -