Effect of Co, Ni, and Cu substitution on the electronic structure of hexagonal YMnO3 studied by x-ray absorption spectroscopy

被引：41

作者：

Asokan, K. ^{[1
,2
,7
]}

Chen, Y. S. ^{[2
]}

Pao, C. W. ^{[2
]}

Tsai, H. M. ^{[2
]}

Lee, C. W. O. ^{[2
]}

Lin, C. H. ^{[2
]}

Hsueh, H. C. ^{[2
]}

Ling, D. C. ^{[2
]}

Pong, W. F. ^{[2
]}

Chiou, J. W. ^{[3
]}

Tsai, M. -H. ^{[4
]}

Pena, O. ^{[5
]}

Moure, C. ^{[6
]}

机构：

[1] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan

[2] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan

[3] Natl Univ Kaohsiung, Dept Appl Phys, Kaohsiung 811, Taiwan

[4] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[5] Univ Rennes 1, UMR 6226, Rennes, France

[6] CSIC, Inst Ceram & Vidrio, Dept Electroceram, Madrid 28500, Spain

[7] Interuniv Accelerator Ctr, New Delhi 67, India

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 13期

关键词：

MANGANITES; PEROVSKITES;

D O I：

10.1063/1.3224905

中图分类号：

O59 [应用物理学];

学科分类号：

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 L-3- 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 L-3-edge feature, which suggests enhancement of the delocalization of Mn 3d e(g) subbands and conductivity. Local spin density approximation (LSDA) + U (Hubbard U parameter) calculations were used to understand their electronic structures. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3224905]

引用

页数：3

共 20 条

[1] Comparison of electronic structures of orthorhombic and hexagonal manganites studied by X-ray absorption spectroscopy [J].