Monoclinic microdomains and clustering in the colossal magnetoresistance manganites Pr0.7Ca0.25Sr0.05MnO3 and Pr0.75Sr0.25MnO3

被引：79

作者：

Hervieu, M ^{[1
]}

VanTendeloo, G ^{[1
]}

Caignaert, V ^{[1
]}

Maignan, A ^{[1
]}

Raveau, B ^{[1
]}

机构：

[1] UNIV CAEN,CNRS,URA 1318,F-14050 CAEN,FRANCE

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.53.14274

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A detailed high-resolution microscopy investigation of two praseodymium manganites, Pr0.7Ca0.25Sr0.05MnO3 and Pr0.75Sr0.25MnO3 which exhibit a resistance ratio of 2.5x10(5) at 88 K and of 7 at 210 K, respectively, is reported. Existence of monoclinic domains in the orthorhombic GdFeO3-type matrix and (A(II)Mn(IV)O(3))(n) clusters corresponding to a modification of the geometry of the MnO6 octahedra has been observed; models are proposed which illustrate the high flexibility of the [MnO2] layers.

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页码：14274 / 14284

页数：11

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