ANNEALING EFFECTS ON TRANSPORT AND MAGNETIC-PROPERTIES OF PEROVSKITE-TYPE VANADIUM-OXIDE CAVO3

被引：36

作者：

FUKUSHIMA, A

IGA, F

INOUE, IH

MURATA, K

NISHIHARA, Y

机构：

[1] Electrotechnical Laboratory, Umezono

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 02期

关键词：

CAVO3; RESISTIVITY; NEGATIVE MAGNETORESISTANCE; SUSCEPTIBILITY;

D O I：

10.1143/JPSJ.63.409

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report transport and magnetic properties for single-crystalline CaVO3, which are seriously affected by oxygen off-stoichiometry. The electrical resistivity of a stoichiometric sample is well fit by the relation rho-rho0+AT2 in an extremely wide temperature range. Oxygen off-stoichiometry causes the systematic increment of both rho0 and A. Magnetoresistance data also change drastically due to the oxygen off-stoichiometry; the stoichiometric sample shows positive magnetoresistance with B2 dependence, while a sample with a small number of oxygen vacancies shows an unusual negative magnetoresistance. Magnetic susceptibility of the latter sample shows Curie-Weiss behavior, while that of the former one shows Pauli paramagnetic behavior.

引用

页码：409 / 412

页数：4

共 9 条

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