Influence of Mn-site doping upon orbital and charge ordering in the Pr0.5A0.5Mn1-xMxO3 manganites (A = Sr, Ca and M = Cr, Al)

被引：74
作者：
Martin, C
Maignan, A
Damay, F
Hervieu, M
Raveau, B
Jirak, Z
André, G
Bourée, F
机构：
[1] ISMRA Univ Caen, CNRS, UMR Associee 6508, Lab CRISMAT, F-14050 Caen, France
[2] Univ Caen, F-14050 Caen, France
[3] Inst Phys, Prague 16200 6, Czech Republic
[4] CEA Saclay, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 202卷 / 01期
关键词：
neutron diffraction; electron microscopy; magnetoresistance; manganites; charge ordering;
D O I：
10.1016/S0304-8853(99)00362-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Cr and Al-doping upon orbital and charge ordering in Pr(0.5)A(0.5)MnO(3) manganites (A = Sr, Ca) has been investigated combining magnetic and transport measurements with neutron powder diffraction and electron microscropy. It is shown that Cr-doping induces or reinforces the ferromagnetic metallic state, and destroys the ordering and associated antiferromagnetism whatever is its nature, A or CE-type. On the contrary, the orbital and charge ordering and associated antiferromagnetic ground states are essentially retained after doping with diamagnetic aluminium. Moreover, the Al-doping in Pr0.5Sr0.5MnO3 expands the antiferromagnetic region and suppresses the ferromagnetism at intermediate temperatures. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：11 / 21
页数：11
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