Influence of disorder on the appearance of Griffiths phases in La0.8-x□xCa0.2MnO3 (x=0.15 and 0.2) compounds

被引：7

作者：

Skini, R. ^{[1
]}

Khlifi, M. ^{[1
]}

Jemmali, M. ^{[2
]}

Dhahri, E. ^{[1
]}

Hlil, E. K. ^{[3
,4
]}

机构：

[1] Univ Sfax, Fac Sci Sfax, Appl Phys Lab, Sfax 3018, Tunisia

[2] Univ Sfax, Fac Sci Sfax, Lab Sci Mat & Environm, Sfax 3000, Tunisia

[3] CNRS, Inst Neel, F-38042 Grenoble 9, France

[4] Univ Grenoble 1, F-38042 Grenoble 9, France

来源：

PHYSICA B-CONDENSED MATTER | 2015年 / 457卷

关键词：

Solid state reaction; Magnetic measurement; Curie temperature; Griffiths phases; Ferromagnetic clusters; TRANSPORT-PROPERTIES; MANGANITES; BEHAVIOR; POINT;

D O I：

10.1016/j.physb.2014.10.025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The La0.8-x square xCa0.2MnO3 (X=0.15 and 0.2) compounds were synthesized by the solid state reaction method. The X-ray diffraction (XRD) and magnetic measurements were used to study their physical and chemical properties. The structural characterization has revealed that these samples are crystallized in the orthorhombic structure with Puma space group. Then, the magnetic properties of these compounds are discussed in detail, building on the magnetization and the susceptibility. The temperature dependence of magnetic susceptibility at higher temperature confirms the presence of the Griffiths phase above the Curie temperature which proves the existence of ferromagnetic clusters in the paramagnetic domain. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：314 / 319

页数：6

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