Multiferroicity in polar phase LiNbO3 at room temperature

被引：13

作者：

Manikandan, M. ^{[1
]}

Kumar, K. Saravana ^{[2
]}

Aparnadevi, N. ^{[1
]}

Shanker, N. Praveen ^{[1
]}

Venkateswaran, C. ^{[1
]}

机构：

[1] Univ Madras, Dept Nucl Phys, Madras 600025, Tamil Nadu, India

[2] SRM Univ, Dept Phys, Madras 600089, Tamil Nadu, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 391卷

关键词：

Weak ferromagnetism; Ferroelectricity; Multiferroics; X-RAY;

D O I：

10.1016/j.jmmm.2015.04.099

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

LiNbO3, prepared by ball milling assisted ceramic method, exhibits weak ferromagnetism and ferroelectricity at room temperature. X-ray diffraction pattern reveals the rhombohedral phase of LiNbO3 with hexagonal unit cell symmetry. The weak ferromagnetic behavior, obtained using VSM, has been explained using Dzyaloshinskii-Moriya interaction caused by the ferroelectric distortion in its magnetic order. The P-E loop measurement shows lossy natured ferroelectric loop. Electrical and dielectric properties analyzed using impedance spectroscopy show two thermally activated conduction processes, derived from the Arrhenius plot. A gradual increase in the dielectric constant below 493 K and a rapid increase above 493 K reveals the contribution of polarization components and Lithium ion hopping. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：156 / 160

页数：5

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