Magnetic evidence of different environments of manganese ions in Mn-substituted strontium titanate

被引：42

作者：

Azzoni, CB

Mozzati, MC

Paleari, A

Massarotti, V

Bini, M

Capsoni, D

机构：

[1] Univ Pavia, Dipartimento Fis A Volta, INFM, I-27100 Pavia, Italy

[2] Univ Milan Bicocca, INFM, Dipartimento Sci Mat, I-20125 Milan, Italy

[3] Univ Pavia, Dipartimento Chim Fis, I-27100 Pavia, Italy

[4] Univ Pavia, CNR, CSTE, I-27100 Pavia, Italy

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 114卷 / 12期

关键词：

disordered systems; grain boundaries; x-ray scattering; electron paramagnetic resonance;

D O I：

10.1016/S0038-1098(00)00121-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electron paramagnetic resonance (EPR) and static magnetization data on manganese substituted (up to 3 mol%) strontium tintanate (Mn:SrTiO3) samples are presented. Four EPR signals are observed from different Mn4+ and Mn2+ sites. The behavior of their intensity vs. temperature is discussed. It suggests the presence of antiferromagnetic interactions in heavily Mn doped grain boundaries. X-ray diffraction analysis shows two coexisting perovskite-type phases, whose abundance depends on the Mn content. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：617 / 622

页数：6

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