Synthesis, structural characterization, electric and magnetic behaviour of a Sr2DyNbO6 double Perovskite

Workshop on Oxide Materials 2014: Novel Multifunctional Properties

物理学;材料科学

Hurtado, P. C. Plazas^1 ; Téllez, D. A. Landínez^1 ; Vásquez, J. A. Cardona^1 ; Vargas, C. A. Parra^2 ; Roa-Rojas, J.^1

Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, AA 5997, Bogotá DC, Colombia^1

Grupo Física de Materiales, Escuela de Física, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia^2

关键词: Complex perovskites;    Magnetic behaviour;    Multifunctional properties;    Relative dielectric constant;    Scanning electron microscopy image;    Standard solid state reaction method;    Structural characterization;    Synthesis and characterizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/614/1/012002/pdf
DOI  :  10.1088/1742-6596/614/1/012002

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Many multifunctional properties have been the focus of our interest in Perovskite research. Herein, we report synthesis and characterization of a new Sr2DyNbO6Perovskite-like material. Samples were produced via standard solid-state reaction method. Rietveld refinement of X-ray diffraction experimental data through the GSAS code reveals that this material crystallizes in a monoclinic complex Perovskite (space group P21/n, #14) with lattice parameters a=5.730(3) Å, b=5.905(1) Å and c=8.221(0) Å. Scanning electron microscopy images reveal that samples evidence a surface with strongly diffuse granular structure. From curves of magnetization as a function of temperature, we determined the paramagnetic behaviour of this complex Perovskite in the temperature regime between 50 and 320 K. Curie fitting allows obtaining an effective magnetic moment of 10.28 μB. Polarization curves as a function of the applied electric field show a hysteretic behavior of typical dielectric loss with relative dielectric constant of 264.28 at room temperature.