Cu$^{2+}$ and Al$^{3+}$ co-substituted cobalt ferrite: structural analysis, morphology and magnetic properties

Bulletin of materials science

S K GHOSHAL¹  SHADAB DABAGH¹  AHMED S JBARA¹  R M ROSNAN¹  ZULKAFLI OTHAMAN¹  ALI A ATI¹  SAMAD ZARE¹ 

[1] Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia$$Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Johor Bahru 81310, MalaysiaIbnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia$$

关键词: Magnetic properties;    chemical synthesis;    XRD;    spinel ferrites;    haematite;    VSM.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Cu�?�Al substituted Co ferrite nanopowders, Co$_{1−x}$Cu$_x$Fe$_{2−x}$Al$_x$O$_4$ ($0.0 �? x �? 0.8$) were synthesized by the co-precipitation method. The effect of Cu�?�Al substitution on the structural and magnetic properties have been investigated. X-ray diffraction (XRD) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, field emissionscanning electron microscopy (FESEM) and vibrating sample magnetometer (VSM) are used for studying the effect of variation in the Cu�?�Al substitution and its impact on particle size, magnetic properties such as Ms and Hc. Cu�?�Alsubstitution occurs and produce a secondary phase, $alpha$-Fe$_2$O$_3$. The crystallite size of the powder calcined at 800$^{circ}$C was in the range of 19�??26 nm. The lattice parameter decreases with increasing Cu�?�Al content. The nanostructural features were examined by FESEM images. Infrared absorption (IR) spectra shows two vibrational bands; at around 600 ($v_1$) and 400 cm$^{�?1}$ ($v_2$). They are attributed to the tetrahedral and octahedral group complexes of the spinel lattice, respectively. It was found that the physical and magnetic properties have changed with Cu�?�Al contents. The saturation magnetization decreases with the increase in Cu�?�Al substitution. The reduction of coercive force, saturation magnetization and magnetic moments are may be due to dilution of the magnetic interaction.

【 授权许可】

Unknown