Influence of temperature on structural and magnetic properties of Co0.5Mn0.5Fe2O4 ferrites

Bulletin of materials science

M Sabieh Anwar³  S Naseem²  S M Ramay³  Murtaza Saleem²  S Atiq²  Saadat A Siddiqi¹ 

[1] Interdisciplinary Research Centre in Biomedical Materials, COMSATS IIT, Off Raiwind Road, Lahore, Pakistan$$Interdisciplinary Research Centre in Biomedical Materials, COMSATS IIT, Off Raiwind Road, Lahore, PakistanInterdisciplinary Research Centre in Biomedical Materials, COMSATS IIT, Off Raiwind Road, Lahore, Pakistan$$;Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan$$Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, PakistanCentre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan$$;School of Science and Engineering, Lahore University of Management Sciences (LUMS), Opposite Sector U, DHA, Lahore 54792, Pakistan$$School of Science and Engineering, Lahore University of Management Sciences (LUMS), Opposite Sector U, DHA, Lahore 54792, PakistanSchool of Science and Engineering, Lahore University of Management Sciences (LUMS), Opposite Sector U, DHA, Lahore 54792, Pakistan$$

关键词: Solâ€�?�gel preparation;    ferrites;    crystallite size;    coercivity.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Co_0.5Mn_0.5Fe₂O₄ ferrites have been synthesized using a single-step solâ€�?�gel auto-combustion method in which the metal nitrate (MN)-to-citric acid (CA) ratio was adjusted to 0.5 : 1 and pH to 7, respectively. The structural and magnetic properties of as-burnt and annealed samples were studied as a function of temperature. The inverse spinel structure was confirmed by X-ray diffraction (XRD) and crystallite size was estimated by the most intense peak (311) using Scherrer’s formula. Contrary to earlier studies reported in the literature, both as-burnt and annealed samples exhibit crystalline behaviour. Room temperature magnetic properties were studied using vibrating sample magnetometer (VSM) with field strengths up to ± 10 kOe. Lattice constant and crystallite size increased as the annealing temperature was increased. However, the coercivity (𝐻_c) initially increased and then decreased with the increase of crystallite size. The variation in coercivity is ascribed to the transition from a multi-domain to a single-domain configuration.

【 授权许可】

Unknown