Structural and magnetic characterization of the new GdMn1-xFexO3 perovskite material

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Vasquez, J.A. Cardona^1,2 ; Téllez, D.A. Landínez^1 ; Collazos, C.A.^2 ; Rojas, J. Roa^1

Universidad Nacional de Colombia, Bogotá, Colombia^1

Universidad Manuela Beltran, Bogotá, Colombia^2

关键词: Antiferromagnetic phase;    Degree of substitution;    Effective magnetic moments;    Ferrimagnetic behavior;    Magnetic characterization;    Magnetic phase transitions;    Magnetization measurements;    Solid state reaction method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012087/pdf
DOI  :  10.1088/1742-6596/687/1/012087

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper we presents the synthesis process of the GdMn1-xFexO3perovskite material by conventional solid state reaction method. Crystalline phase evolution during the synthesis was studied by X-ray Diffraction (XRD) in powder of the materials, observing that the chemical reaction of the precursor oxides was significant above 1000°C. Rietveld refinement of DRX patterns shows a perovskite structure with octahedral distortions (space group Pbnm, # 62) for studied values of x (0, 0.1 and 0.2). The degree of substitution generates an increasing tendency on lattice parameters a and c, while for b is decreasing just as for the volume of the unit cell. The effect of the change in the lattice parameters directly affects the octahedral distortions, ie, with increasing degree of substitution (increased parameter c) octahedra tend to arrange one above the other aligned with the c axis. Magnetization measurements as a function of temperature were performed above room temperature between 300K and 860K with an applied field of 20Oe and below room temperature in Field Cooling (FC) and Zero Field Cooling modes (ZFC) between 4.2K and 300K with an applied field of 200Oe. Magnetic behavior above room temperature is paramagnetic for used values of x, on the other hand at low temperatures (T