Tetragonal to monoclinic transition in the metallic antiferromagnet Pr0.5Sr0.5MnO3

被引：34

作者：

Llobet, A

García-Muñoz, JL

Frontera, C

Ritter, C

机构：

[1] CNRS, Lab Louis Neel, F-38042 Grenoble 9, France

[2] CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, Spain

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.60.R9889

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structural changes associated with the ferromagnetic (FM)/metallic to antiferromagnetic (AFM)/insulating transition of Pr1/2Sr1/2MnO3 (I4/mcm-->P2(1)/n) are described in detail. Based on high-resolution neutron-diffraction data, in the P2(1)/n phase Mn1 and Mn2 octahedra have the same charge and are identically deformed. The electronically induced transition to the antiferromagnetic A-type structure at T-N is the result of a stretchinglike distortion of the octahedra that (i) contracts the Mn-O2 bond perpendicular to the FM planes by deviating beta from 90 degrees and (ii) injects electrons into Mn-O1 and Mn-O3 bonds. The observed microscopic changes are completely different to the structural transition in the A-type LaMnO3 and are discussed in the light of the orbital polarization previously proposed. [S0163-1829(99)51038-2].

引用

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页码：R9889 / R9892

页数：4

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