Crystal structure evolution of Sm0.6Sr0.4MnO3 in the temperature range 1.5-300 K

被引：3

作者：

Chernyshov, DY ^{[1
]}

Kurbakov, AI ^{[1
]}

Trounov, VA ^{[1
]}

机构：

[1] Russian Acad Sci, Petersburg Nucl Phys Inst, St Petersburg 188350, Russia

来源：

PHYSICA B | 2000年 / 276卷

关键词：

giant magnetoresistance; neutron powder diffraction; manganites; phase separation;

D O I：

10.1016/S0921-4526(99)01494-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron powder diffraction experiments on (Sm0.6Sr0.4MnO3)-Sm-154 in the temperature range from 1.5 to 300 K have been performed using the high-resolution G4.2 (LLB, France) diffractometer. The material undergoes an insulator-metal transition at T similar to 120 K and exibits the giant magnetoresistance effect. The Jahn-Teller transition temperature is found to be close to 180 K. The temperature dependence of microstrain parameters related to anisotropic peak broadening is obtained. Magnetic scattering detected for T < 130 K can be formally attributed to the canted ferromagnetic state. The consequences of our experimental results are discussed in the context of current ideas about structure and magnetotransport properties of manganites. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：318 / 319

页数：2

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