Magnetic and dielectric properties of orthoferrites La1-x PrxFeO3 (x=0, 0.1, 0.2, 0.3, 0.4 and 0.5)

被引：43

作者：

Chanda, Sadhan ^{[1
]}

Saha, Sujoy ^{[1
]}

Dutta, Alo ^{[2
]}

Irfan, Bushra ^{[3
]}

Chatterjee, Ratnamala ^{[3
]}

Sinha, T. P. ^{[1
]}

机构：

[1] Bose Inst, Dept Phys, Kolkata 700009, India

[2] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700098, India

[3] Indian Inst Technol, Dept Phys, New Delhi 110016, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 649卷

关键词：

Perovskite oxide; Sol-gel chemistry; Raman modes; Antiferromagnetic; Impedance spectroscopy; Dielectric properties; RARE-EARTH ORTHOFERRITES; PEROVSKITE; CONDUCTIVITY; PERFORMANCE; RELAXATION; YFEO3; CA; LA;

D O I：

10.1016/j.jallcom.2015.07.215

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：

The Pr doped LaFeO3 are synthesized by the sol-gel citrate method. The crystal structure of the samples can be described by the Pbnm space group. The Raman spectra of the materials show that the vibrational modes are heavily influenced by the magnitude of the orthorhombic distortion. The antiferromagnetic nature of the samples is examined by temperature dependent magnetisation measurements and the corresponding hysteresis loop. A signature of weak ferromagnetic phase is observed in the samples at low temperature due to the canting of the iron sublattices. The frequency dependent dielectric relaxation of the sample has been investigated in the temperature range from 303 K to 513 K in the framework of conductivity and electric modulus formalisms. The complex impedance plots are explained by an electrical equivalent circuit consisting of constant phase element and resistance. A significant change of the conductivity is observed with the increase of Pr concentration. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：1260 / 1266

页数：7

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