Effect of Co, Ni, and Cu substitution on the electronic structure of hexagonal YMnO3 studied by x-ray absorption spectroscopy
學年 98
學期 1
出版（發表）日期 2009-09-01
作品名稱 Effect of Co, Ni, and Cu substitution on the electronic structure of hexagonal YMnO3 studied by x-ray absorption spectroscopy
作品名稱（其他語言）
著者 Asokan, K.; Chen, Y. S.; Pao, C. W.; Tsai, H. M.; Lee, C. W. O.; Lin, C. H.; Hsueh, H. C.; Ling, D. C.; Pong, W. F.; Chiou, J. W.; Tsai, M.-H.; Peña, O.; Moure, C.
單位 淡江大學物理學系
出版者 College Park: American Institute of Physics (AIP)
著錄名稱、卷期、頁數 Applied Physics Letters 95(13), pp.131901(3 pages)
摘要 X-ray absorption spectroscopy measurements have been performed to elucidate local electronic and atomic structures of orthorhombic 3d-transition metal-doped yttrium manganites (YMnO3) with chemical formulae YMn2/3Me1/3O3 (Me = Co, Ni, and Cu). The Mn L3- and K-edges x-ray absorption near-edge structure (XANES) demonstrate the direct substitution of Me2+ for Mn3+, so that the positive effective charge of Mn ions are increased. Me-doping is also found to induce substantial broadening of the Mn L3-edge feature, which suggests enhancement of the delocalization of Mn 3d eg subbands and conductivity. Local spin density approximation (LSDA)+U (Hubbard U parameter) calculations were used to understand their electronic structures.
關鍵字 density functional theory; doping profiles; manganese compounds; XANES; yttrium compounds
語言 en
ISSN 0003-6951 1077-3118
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Pong, W. F.
審稿制度
國別 USA
公開徵稿
出版型式 紙本 電子版
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