Charge delocalization and structural response in layered La1.2Sr1.8Mn2O7: Enhanced distortion in the metallic regime

被引：255

作者：

Mitchell, JF

Argyriou, DN

Jorgensen, JD

Hinks, DG

Potter, CD

Bader, SD

机构：

[1] ARGONNE NATL LAB, SCI & TECHNOL CTR SUPERCONDUCTIV, ARGONNE, IL 60439 USA

[2] ARGONNE NATL LAB, DIV SCI MAT, ARGONNE, IL 60439 USA

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.55.63

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Temperature-dependent neutron diffraction studies on melt-grown crystals of the layered compound La1.2Sr1.8Mn2O7 reveal a dramatic structural response to the onset of ferromagnetism and the coincident insulator-metal transition. Unlike the related manganite perovskites, whose Jahn-Teller distorted octahedra become more regular at temperatures below the insulator-metal transition, the MnO6 octahedra of this layered material are more severely distorted when the charge is itinerant than when it is localized.

引用

页码：63 / 66

页数：4

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