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Magnetic Properties and Impedance Spectroscopic Studies of Multiferroic Bi_1-xNd_xFeO₃ Materials

Journal of Magnetics, Volume 21, Number 1, 31 Mar 2016, Pages 29-34

Dao Viet Thang *

(Center for Nano Science and Technology, Hanoi National University of Education), Du Thi Xuan Thao (Department of Physics, Hanoi University of Mining and Geology), Nguyen Van Minh (Center for Nano Science and Technology, Hanoi National University of Education)

Abstract

Nd-doped BiFeO₃ materials were synthesized via a sol–gel method. The crystal structure, magnetic properties, and complex impedance spectroscopy of multiferroic Bi_1-xNd_xFeO₃ (BNFO) materials were investigated by Xray diffraction (XRD), Raman scattering, vibrating sample magnetometer (VSM), and complex impedance spectroscopy. Our results show that the lattice crystal constants (a, c) and the ratio c/a of BNFO materials decreased with increasing Nd concentration. All samples exhibited weak ferromagnetism at room temperature, and the magnetization of samples was enhanced by the presence of Nd³⁺ ions. There was an enhancement in the spontaneous magnetization of BFO with increasing Nd concentration, which is attributable to the collapse of the spin cycloid structure.

Keywords: multiferroic; Raman; Nd-doped; magnetization; impedance

DOI: http://dx.doi.org/10.4283/JMAG.2016.21.1.029

Full Text: PDF

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