Multiferroicity in polar phase LiNbO3 at room temperature

作者：Manikandan M; Kumar K Saravana; Aparnadevi N; Shanker N Praveen; Venkateswaran C^*

来源：Journal of Magnetism and Magnetic Materials, 2015, 391: 156-160.

DOI：10.1016/j.jmmm.2015.04.099

• Weak ferromagnetism
• Ferroelectricity
• Multiferroics

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.

• 出版日期2015-10-1