Synthesis under usual conditions, X-ray photoelectron spectroscopy and magnetic properties of Re1-xMnxO2 oxides with rutile structure

被引：10
|
作者：
Bazuev, G. V. [1 ]
Chupakhina, T. I. [1 ]
Korolyov, A. V. [2 ]
Kuznetsov, M. V. [1 ]
机构：
[1] Russian Acad Sci, Inst Solid State Chem, Ural Branch, Ekaterinburg 620990, Russia
[2] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620041, Russia
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 124卷 / 2-3期
关键词：
Re1-xMnxO2; Synthesis; Crystal structure; XPS spectra; Magnetic properties; SUPPORTED RHENIUM OXIDES; CRYSTAL-STRUCTURE; METAL DIOXIDES; TEMPERATURE; BETA-MNO2; TRANSPORT; METHANOL; REO2; LN;
D O I：
10.1016/j.matchemphys.2010.07.057
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Solid solutions Re1-xMnxO2 (x=0 008 0 21) with a tetragonal rutile-type structure (sp gr P4(2)/mnm z=2) have been synthesized from NH4ReO4 KReO4 and KMnO4 in argon atmosphere at 450-520 C in a quartz cell According to XPS measurements Mn in solid solutions Re1-xMnxO2 is present as Mn3+ and Mn2+ cations while the degree of oxidation of Re partly increases to penta- or hexavalent state A transition of ReO2 presumably in the antiferromagnetic state at 41K was for the first time established by magnetic measurements Along with the anomaly at 41K the second magnetic transitions at 6 5K (x = 0 08) and 11 K (x = 0 21) was registered in these solid solutions (c) 2010 Elsevier B V All rights reserved
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收藏
页码：946 / 951
页数：6
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