Synthesis, structure and magnetic properties of nanodimensional La1-xBaxFe0.5Mn0.5O3 Perovskites

被引：10

作者：

Dutta, Uma ^{[1
]}

Hossain, Aslam ^{[1
,2
]}

Walke, Pravin S. ^{[3
]}

Ghosh, Debamalya ^{[1
]}

Mordvinova, Natalia E. ^{[4
]}

Lebedev, Oleg I. ^{[4
]}

Haque, Ariful ^{[1
]}

Pal, Kamalesh ^{[5
]}

Gayen, Arup ^{[5
]}

Kundu, Asish K. ^{[6
]}

Seikh, Md. Motin ^{[1
]}

机构：

[1] Visva Bharati Univ, Dept Chem, Santini Ketan 731235, W Bengal, India

[2] Ural Fed Univ, Inst Nat Sci, Dept Chem, Ekaterinburg 620000, Russia

[3] Univ Mumbai, Natl Ctr Nanosci & Nanotechnol, Kalina Campus, Bombay 400098, Maharashtra, India

[4] ENSICAEN UMR6508, Lab CRISMAT, 6 Bd Marechal Juin, F-14050 Caen 4, France

[5] Jadavpur Univ, Dept Chem, Kolkata 700032, India

[6] Indian Inst Informat Technol Design & Mfg Jabalpu, Discipline Phys, Dumna Airport Rd, Jabalpur 482005, Madhya Pradesh, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 777卷

关键词：

Perovskite; Nanoparticle; Ferromagnetic cluster; Size disorder; Cationic ordering; RARE-EARTH MANGANATES; FE; X=0; CA; SR; LN; ND;

D O I：

10.1016/j.jallcom.2018.11.101

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：

Here we report synthesis, structure and magnetic properties of low temperature synthesized nanodimensional La1-xBaxFe0.5Mn0.5O3 (x = 0.25, 0.33 and 0.50) perovskites. All the samples crystallize in cubic Pm-3m space group. The additional reflection spots (110) in electron diffraction (ED) requiring doubling of cubic cell parameter suggests the possible ordering of Fe and Mn in B-site. The magnetic property of the nanostructured samples is associated with the ferromagnetic clusters developed at the surface of nanoparticles. Such clusters disappeared subsequent to high temperature annealing. Importantly, unlike the homologous series La0.5Ca0.5Fe0.5Mn0.5O3 and La0.5Sr0.5Fe0.5Mn0.5O3 or electronically equivalent ferromagnetic LaFe0.5Cr0.5O3(T-C similar to 120 K), La0.5Ca0.5Fe0.5Mn0.5O3 fails to exhibit any long range ordering. This curious observation can be better rationalized by considering the cationic size disorder parameter (sigma(2) = Sigma x(i)r(i)(2) -<r(A)>(2)) in A-site rather than the random distribution of Fe and Mn in B-site. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1396 / 1402

页数：7

共 35 条

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