Magnetic order in pure LaMnO3 and in Ca-doped single crystals

被引：9

作者：

De Renzi, R

Allodi, G

Guidi, MC

Guidi, G

Hennion, M

Pinsard, L

Amato, A

机构：

[1] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

[2] Univ Parma, Unita INFM, I-43100 Parma, Italy

[3] Lab Leon Brillouin, Saclay, France

[4] Paul Scherrer Inst, Villigen, Switzerland

来源：

PHYSICA B | 2000年 / 289卷

关键词：

magnetism; manganites; muon site;

D O I：

10.1016/S0921-4526(00)00251-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present recent mu IR results on a single crystal of pure LaMnO3, showing the existence of two equal amplitude spontaneous muon frequencies below T-N = 139.5 K. The local fields are 0.9510(3) and 0.6290(2) T at T = 0. The lower frequency site is identified by virtue of the dependence of the frequency on the applied field. The magnetic properties of the end member material are briefly discussed on the basis of these observations. Zero-field precessions are also observed in La0.92Ca0.08MnO3 and in La0.85Ca0.15MnO3 single crystals. A new magnetic phase appears in both of them between the ordered low-temperature and the paramagnetic high-temperature phases. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：52 / 55

页数：4

共 11 条

[1] 139La NMR in lanthanum manganites:: Indication of the presence of magnetic polarons from spectra and nuclear relaxations [J].