A.c. susceptibility study of CaCl2 doped copper�?�zinc ferrite system

Bulletin of materials science

A S Vaingankar¹  A Y Lipare¹  P N Vasambekar¹ 

[1] Post Graduate Department of Electronics, Shivaji University, Kolhapur 416 004, India$$Post Graduate Department of Electronics, Shivaji University, Kolhapur 416 004, IndiaPost Graduate Department of Electronics, Shivaji University, Kolhapur 416 004, India$$

关键词: Polycrystalline ferrites;    a.c. susceptibility;    Curie temperature;    magnetic properties with CaCl2 doping;    effect of additives.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Polycrystalline soft ferrites, Zn$_x$ Cu$_{1â€�?�x}$ Fe₂O₄ (ð‘�? = 0.30, 0.50, 0.70, 0.80 and 0.90), doped with controlled amount of calcium chloride (CaCl₂) were prepared by standard ceramic route and studied for a.c. susceptibility. X-ray diffraction studies of the compositions reveal formation of single-phase cubic spinel. The values of lattice constant increase as doping percentage of CaCl₂ increased from 0.01% to 0.05% and afterwards decrease slightly. The presence of chlorine ions is confirmed by absorption peak in far IR spectra near 650 cm^-1 for all the samples. The variation of a.c. susceptibility with temperature shows the existence of single domain structure for ð‘�? = 0.3 and exhibits transition from single domain to multidomain structure with increased Ca²⁺ contents from 0.01 to 0.1%. The composition, ð‘�? = 0.5, shows multidomain structure independent of Ca²⁺ content. The samples for ð‘�? = 0.70, 0.80 and 0.90 show paramagnetic behaviour at and above room temperature.

【 授权许可】

Unknown