Synthesis and magnetic study of Co�?�Al substituted calcium hexaferrite

Bulletin of materials science

K G Rewatkar¹  S R Gawali²  N M Patil³ 

[1] Department of Physics, Dr Ambedkar College, Nagpur 440 010, India$$Department of Physics, Dr Ambedkar College, Nagpur 440 010, IndiaDepartment of Physics, Dr Ambedkar College, Nagpur 440 010, India$$;Department of Physics, Dr Ambedkar College, Chandrapur 442 401, India$$Department of Physics, Dr Ambedkar College, Chandrapur 442 401, IndiaDepartment of Physics, Dr Ambedkar College, Chandrapur 442 401, India$$;Department of Applied Physics, Nagpur University, Nagpur 440 001, India$$Department of Applied Physics, Nagpur University, Nagpur 440 001, IndiaDepartment of Applied Physics, Nagpur University, Nagpur 440 001, India$$

关键词: Polycrystalline ferrites;    saturation magnetization;    Curie temperature;    coercivity;    magnetoplumbite.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

A series of calcium substituted polycrystalline ferrite ceramics with magnetoplumbite structures were synthesized using perfect stoichiometric mixtures of oxides with chemical composition, CaAl_ð‘�?Co_ð‘�?Fe_{12â€�??2ð‘�?}O₁₉ (ð‘�? = 2â€�??5), by standard ceramic technique. The variation in the values of 𝐻_c and 𝑀_s, which depends on the additive content and the temperature, was studied by means of a vibration magnetometer. The strong variation observed in coercivity, saturation magnetization and Curie temperature with chemical composition give rise to the possibility of controlling these properties and hence applying these compounds in the millimeterâ€�?�microwave range.

【 授权许可】

Unknown