Effects of Ni and Annealing Temperature on Crystal Structure and Magnetic Properties of MnNi-Fe2O4 Nanoparticles

9th Annual Basic Science International Conference 2019

自然科学（总论）

Herdiman^1 ; Saputra, A.I.^1 ; Suharyadi, E.^1 ; Kato, T.^2 ; Iwata, S.^3

Department of Physics, Universitas Gadjah Mada, Yogyakarta, Indonesia^1

Department of Electronics, Nagoya University, Japan^2

Institute of Materials and Systems for Sustainability, Nagoya University, Japan^3

关键词: Annealing temperatures;    Coprecipitation method;    Cubic spinel structure;    Fourier transform infrared;    Stretching vibrations;    Structural and magnetic properties;    Vibrating sample magnetometer;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/546/4/042011/pdf
DOI  :  10.1088/1757-899X/546/4/042011

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

Manganese nickel ferrite (MnNi-Fe2O4) nanoparticles have been synthesized by co-precipitation method. In this research, the effects of Ni concentration (0.2-0.8M) and annealing temperature (400-1000°C) on the structural and magnetic properties of nanoparticles were studied. Ferrite samples were characterized by X-ray Diffractometer (XRD), Transmission Electron Microscope (TEM) and Fourier Transform Infrared (FTIR) spectroscope. The XRD patterns showed that nanoparticles possess cubic spinel structure that indicated by peaks of (220), (311), (400), (511) and (440). The crystallite size decreased with the increase of Ni concentration (23.5-4.5 nm) and increased with the increase of annealing temperature (14.8-49.3 nm). Stretching vibration on octahedral and tetrahedral of metal-oxygen from FTIR spectra was observed at 354.9-462.9 cm-1 and 586.3-601.7 cm-1, respectively. Magnetic properties of ferrite sample were analyzed by Vibrating Sample Magnetometer (VSM). The saturation magnetization (Ms) lay in the range of 11.07-20.7 emu/g and the Coercivity (Hc) decreases with the increase of annealing temperature (217.0-167.0 Oe).