Study of disorder effects in La substituted Ca2FeMoO6 ferrimagnet using magnetic and transport measurements

被引：12

作者：

Muthuselvam, I. Panneer ^{[1
]}

Poddar, Asok ^{[2
]}

Bhowmik, R. N. ^{[1
]}

机构：

[1] Pondicherry Univ, Dept Phys, Pondicherry 605014, India

[2] Saha Inst Nucl Phys, Expt Condensed Matter Phys Div, Kolkata 700064, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 486卷 / 1-2期

关键词：

Double Perovskite; Solid State sintering; Surface morphology; Ferrimagnetism; DOUBLE-PEROVSKITE; CURIE-TEMPERATURE; MAGNETORESISTANCE; TRANSITION;

D O I：

10.1016/j.jallcom.2009.06.200

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have substituted non-magnetic La in ferrimagnetic Ca2-xLaxFeMoO6 double perovskite. The cell volume showed expansion with the increase of La substitution in monoclinic crystal structure and space group P2(1)/n. Analysis of XRD spectrum indicated the increase of disorder in lattice structure. Surface structure of the material is modified from adhesive type for x = 0 sample to brittle type in La doped samples, suggesting the increase of grain boundary contributions. DC magnetization and ac susceptibility measurements showed reduction of magnetic moment, enhancement of T-c, and cluster spin-glass phase in the ferromagnetic matrix. These experimental results confirmed the enhancement of magnetic disorder in 12 doped samples. The reduction of metallic nature in the compound provided additional support of enhanced disorder upon La doping in double perovskite structure. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：536 / 542

页数：7

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