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Valence Band Photoemission Study of Co / Pd Multilayer
강정수(J.-S. Kang),강상국(S.K. Kim),정재인(J.I. Jeong),홍재화(J.H. Hong),이영백(Y.P. Lee),신현준(H.J. Shin),C. G. Olsong(C. G. Olsong) 한국자기학회 1993 韓國磁氣學會誌 Vol.3 No.1
We report the photoemission (PES) studies for the Co /Pd multilayer. The Co 3d PES spectrum of Co /Pd exhibits two interesting features, one near the Fermi energy, E_F, and another at ~2.5 eV below E_F. the Co 3d peak near E_F of Co /Pd is much narrower than that of the bulk Co, consistent with the enhanced Co magnetic moment in Co /Pd compared to that in the bulk Co. The Co 3d feature at ~ -2.5 eV resembles the Pd valence band structures, which suggests a substantial hybridization between the Co and Pd sublayers. The Co 3d PES spectrum of Co /Pd is compared with the existing band structures, obtained using the local spin density functional calculations. A reasonable agreement is found concerning the bandwidth of the occupied part of the Co 3d band, whereas a narrow Co 3d peak near E_F seems not to be described by the band structure calculations.