Multiferroicity in polar phase LiNbO3 at room temperature

被引:14
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
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
收藏
页码:156 / 160
页数:5
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