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Angle resolved photoemission spectroscopy (ARPES) with a synchrotron radiation as an incident photon source was performed on the layered cobalt oxides Na0.8CoO2. The measured electronic structure was compared with that of the Na0.7CoO2 previously reported. The observed energy-momentum dispersion of the Na0.8CoO2 was essentially the same with that of the Na0.7CoO2 except for the small difference in...
The composition dependence of the giant magnetoresistance due to the interlayer exchange coupling of Ni-Co/Cu and Co-Fe/Cu multilayer films was studied. Samples were prepared by magnetron sputtering on a glass substrate. They had an fcc (111) preferred orientation parallel to the growth direction. Both the MR ratio and the saturation field were observed to oscillate as functions of the Cu thickness...
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