Neutron powder diffraction studies of the La0.65Pb0.35MnO3 perovskite

被引：4

作者：

Borca, CN

Adenwalla, S

Liou, SH

Xu, QL

Robertson, JL

Dowben, PA

机构：

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

来源：

MATERIALS LETTERS | 2002年 / 57卷 / 02期

基金：

美国国家科学基金会;

关键词：

perovskites; crystal structure; neutron diffraction; ferromagnetic resonance; Jahn-Teller distortions; spin reorientation transition;

D O I：

10.1016/S0167-577X(02)00785-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure of La0.65Pb0.35MnO3 has been studied by neutron powder diffraction. From the temperature dependence of the lattice parameters, we observe that La0.65Pb0.35MnO3 remains single phase in the temperature interval from 25 to 400 K, with a rhombohedral (R(3) over bar c) structure. The collinear Mn spins suffer a thermally driven reorientation transition close to the Curie temperature, as obtained from powder samples (using neutron diffraction) and from thin films [using ferromagnetic resonance (FMR)]. The reorientation transition may indicate the presence of local Jahn-Teller (JT) lattice distortions, which are prevented from developing with long-range order in the R(3) over bar c crystal structure. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：325 / 329

页数：5

共 16 条

[1] Evidence of magnetization-dependent polaron distortion in La(1-x)A(x)MnO(3), A=Ca, Pb [J].