Structure and magnetic interactions in (Sr, Sb)-doped lanthanum manganites

被引：13

作者：

Karpinsky, D. V. ^{[1
,2
]}

Troyanchuk, I. O. ^{[1
]}

Silibin, M. V. ^{[1
]}

Gavrilov, S. A. ^{[1
]}

Bushinky, M. V. ^{[2
]}

Sikolenko, V. ^{[3
]}

Frontzek, M. ^{[4
]}

机构：

[1] Natl Res Univ Elect Technol MIET, Moscow 124498, Zelenograd, Russia

[2] NAS Belarus, Sci Pract Mat Res Ctr, Minsk 220072, BELARUS

[3] Joint Inst Nucl Res, Dubna 141980, Russia

[4] Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland

来源：

PHYSICA B-CONDENSED MATTER | 2016年 / 489卷

基金：

俄罗斯科学基金会;

关键词：

Ceramics; Neutron scattering and diffraction; Magnetometry; Magnetic properties; Electronic characterization;

D O I：

10.1016/j.physb.2016.01.037

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Ceramic samples Lai (x <= 0.2) have been studied by X-ray and neutron powder diffraction, magnetization measurements and charge density calculations have also been performed. The compounds are characterized by the rhombohedral structure at room temperature; temperature decrease causes structural transition to the orthorhombic structure. La1-2xSr2xMn1-xSbxO3 ceramics are characterized by homovalent manganese ions and have long range ferromagnetic order which gradually diminishes with the chemical substitution. It is considered that magnetic properties of the compounds are determined by the dominance of ferromagnetic superexchange interactions stabilized in the orbital disordered orthorhombic phase. Significant covalent component of the Mn-O chemical bonds contributes to the long-range ferromagnetic order of the compounds, the covalency of the chemical bonds is assumed to be isotropically distributed over the orthorhombic phase. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：45 / 50

页数：6

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