Magnetic and transport properties of La0.7-xPrxPb0.3MnO3

被引：4

作者：

Chen, HZ

Young, SL

Chen, YC

Horng, L

Shi, JB

机构：

[1] Hsiuping Inst Technol, Dept Elect Engn, Taichung 412, Taiwan

[2] Natl Sun Yat Sen Univ, Dept Elect Engn, Kaohsiung, Fukuoka 804, Taiwan

[3] Natl Changhua Univ Educ, Dept Phys, Changhua 500, Taiwan

[4] Feng Chia Univ, Dept Elect Engn, Taichung 407, Taiwan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 329卷

关键词：

colossal magnetoresistance; ferromagnetic-paramagnetic; metal-insulator;

D O I：

10.1016/S0921-4526(02)02474-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The substitution of Pr on the La site in La1-xPrxPb0.3MnO3 has been studied in order to probe into the physical mechanisms of colossal magnetoresistance (CMR) behavior. The magnetic order changes from a long-range order with x = 0.0 to a short-range nature with x = 0.7. The ferro-paramagnetic and metal-insulator transition temperature values decrease as Pr content increases. The highest MR ratio value is 16.9% for x = 0.0 against 41.6% for x = 0.7 in an applied field of 1 T. It is suggested that the mean ionic radius of the La-site ions may plays an important role on the CMR effect. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：729 / 730

页数：2

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