Infrared absorption spectroscopic study of Nd3+ substituted Zn�?�Mg ferrites

Bulletin of materials science

B P Ladgaonkar²  A S Vaingankar¹  C B Kolekar² 

[1] Department of Electronics, Shivaji University, Kolhapur 416 004, India$$Department of Electronics, Shivaji University, Kolhapur 416 004, IndiaDepartment of Electronics, Shivaji University, Kolhapur 416 004, India$$;Department of Electronics, Shankarrao Mohite Mahavidyalaya, Akluj District, Solapur 413 101, India$$Department of Electronics, Shankarrao Mohite Mahavidyalaya, Akluj District, Solapur 413 101, IndiaDepartment of Electronics, Shankarrao Mohite Mahavidyalaya, Akluj District, Solapur 413 101, India$$

关键词: Polycrystalline ferrites;    rare earth;    IR absorption;    cation distribution;    force constants.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Compositions of polycrystalline Zn_ð‘�?Mg_{1-ð‘�?}Fe_{2â€�?�ð�?��?}Nd_ð‘�?O₄ (ð‘�? = 0.00, 0.20, 0.40, 0.60, 0.80 and 1.00; ð‘�? = 0.00, 0.05 and 0.10) ferrites were prepared by standard ceramic method and characterized by X-ray diffraction, scanning electron microscopy and infrared absorption spectroscopy. Far infrared absorption spectra show two significant absorption bands, first at about 600 cm^â€�??1 and second at about 425 cm^â€�??1 , which were respectively attributed to tetrahedral (A) and octahedral (B) sites of the spinel. The positions of bands are found to be composition dependent. The force constants, $K_T$ and $K_O$, were calculated and plotted against zinc concentration. Compositional dependence of force constants is explained on the basis of cationâ€�?�oxygen bond distances of respective sites and cation distribution.

【 授权许可】

Unknown