Electron paramagnetic resonance of cerium and alkali-doped manganites: a tool for fast characterization within a combinatorial chemistry approach

被引：4

作者：

Gervais, F ^{[1
]}

Lecomte, J

Cotte, M

Schoenstein, F

Gervais, M

Maignan, A

Simon, P

机构：

[1] Univ Tours, Fac Sci & Tech, CEA,LRC M01 Associe, FRE 2077 Associee,CNRS,Lab Electrodynam Mat Avanc, F-37200 Tours, France

[2] ISMRA, UMR 6508, CRISMAT, F-14050 Caen, France

[3] CNRS, Ctr Rech Phys Hautes Temperatures, F-45071 Orleans, France

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2000年 / 77卷 / 01期

关键词：

electron paramagnetic resonance; combinatorial chemistry; manganites;

D O I：

10.1016/S0921-5107(00)00438-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cerium. sodium and potassium ions have been substituted to lanthanum and strontium within the series La(1-x)A(x)MnO(3), starting from the composition La0.8Sr0.2MnO3. The temperature of transition from the high-temperature paramagnetic 'insulating' phase to the low-temperature ferromagnetic conducting phase has been studied versus composition by electron paramagnetic resonance. It is shown that. in addition to the resonant line near g equal to 2, characteristic of the paramagnetic phase, a lower-field asymmetric signal appears upon cooling in the ferromagnetic phase. The onset of this low-field additional signal scales with that of magnetization, is ascribed, therefore, to ferromagnetic resonances. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：11 / 14

页数：4

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