Electrical Resistivity in Non-stoichiometric MoO2

被引：10

作者：

Alves, L. M. S. ^{[1
]}

Benaion, S. S. ^{[1
]}

Romanelli, C. M. ^{[1
]}

dos Santos, C. A. M. ^{[1
]}

da Luz, M. S. ^{[1
,2
]}

de Lima, B. S. ^{[1
]}

Oliveira, F. S. ^{[1
]}

Machado, A. J. S. ^{[1
]}

Guedes, E. B. ^{[3
]}

Abbate, M. ^{[3
]}

Mossanek, R. J. O. ^{[3
]}

机构：

[1] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP, Brazil

[2] Univ Fed Triangulo Mineiro, Inst Ciencias Tecnol & Exatas, BR-38064200 Uberaba, MG, Brazil

[3] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, PR, Brazil

来源：

BRAZILIAN JOURNAL OF PHYSICS | 2015年 / 45卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

Oxides; Photoelectron spectroscopy; Electrical properties; CRYSTAL-STRUCTURE; STRUCTURAL TRANSITIONS; MOLYBDENUM OXIDES;

D O I：

10.1007/s13538-015-0307-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

MoO (y) with 1.85 a parts per thousand currency signaEuro parts per thousand y a parts per thousand currency signaEuro parts per thousand 2.20 has been studied by X-ray diffractometry and photoemission spectroscopy at room temperature and by electrical resistance as a function of temperature from 2 to 300 K. Although X-ray diffractograms are very similar to the stoichiometric MoO2 with monoclinic structure of the space group P2(1)/c (14), the electrical properties are strongly dependent on the oxygen composition. Samples with y = 1.85 and 1.90 show anomalous behavior in electrical conductivity. Photoemission and X-ray absorption spectroscopy measurements suggest that this anomalous behavior is related to the presence of Mo3+ ions such as in KxMoO2 compound.

引用

页码：234 / 237

页数：4

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