MECHANISM OF METAL-INSULATOR-TRANSITION IN THE SYSTEMS (LN1-XCAX)MNO3-DELTA(LN LA, ND, AND GD) AND (ND0.1CA0.9-YSRY)MNO2.97

被引：13

作者：

TAGUCHI, H ^{[1
]}

NAGAO, M ^{[1
]}

SHIMADA, M ^{[1
]}

机构：

[1] TOHOKU UNIV,FAC ENGN,DEPT MOLEC CHEM & ENGN,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1992年 / 97卷 / 02期

关键词：

D O I：

10.1016/0022-4596(92)90057-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The electrical resistivity (ρ{variant}) of the perovskite-type (Ln1-xCax)MnO3-δ (Ln: La, Nd, and Gd) and (Nd0.1Ca0.9-ySry)MnO2.97 were measured in the temperature range 300 to 800 K. In the case of (Ln1-xCax)MnO3-δ (Ln: La, Nd, and Gd), dρ{variant} dT increases with increasing x. The increase of dρ{variant} dT is explained by both the decrease in the MnO distance and the number of 3d electrons which exist in the conduction band. On the other hand, in the case of (Nd0.1Ca0.9-ySry)MnO2.97, dρ{variant} dT decreases slightly with increasing y and corresponds to an increase in the MnO distance. © 1992.

引用

页码：476 / 480

页数：5

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