Electronic structures of AgNi1-xCoxO2 delafossite oxides

被引：1

作者：

Lee, H. J.

Lee, S. S.

Kim, G.

Kang, J.-S. ^{[1
]}

Song, H. K.

Shin, Y. J.

Han, S. W.

Song, H. J.

Shin, H. J.

Min, B. I.

机构：

[1] Catholic Univ Korea, Dept Phys, Puchon, South Korea

[2] Catholic Univ Korea, Dept Chem, Puchon, South Korea

[3] Seoul Natl Univ, CSCMR, Seoul 151742, South Korea

[4] Pohang Accelerator Lab, Pohang 790784, South Korea

[5] POSTECH, Dept Phys, Pohang 790784, South Korea

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

delafossite; PES; XAS;

D O I：

10.1016/j.jmmm.2006.10.864

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electronic structures of AgNi1-xCoxO2 (0 <= x <= 1) delafossite oxides have been investigated by using photoemission spectroscopy (PES) and soft X-ray absorption spectroscopy (XAS). T 2p XAS (T = Co, Ni) spectra of AgNi1-xCoxO2 show that the valence states of Co ions are trivalent and do not change with x. In contrast, Ni ions are in the Ni2+-Ni3+ mixed-valent states and the trivalent component increases with increasing x. This finding suggests that the metallic nature of AgNi1-xCoxO2 for low values of x arises from the divalent Ni ions. The valence-band PES study of AgNi1-xCoxO2 reveals that the Ni 3d states are more metallic like than the Co 3d states. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1620 / 1622

页数：3

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