Magnetic behavior of the oxide spinels: Li0.5Fe2.5-2𝑥Al𝑥Cr𝑥O4

Pramana

H H Joshi¹  K B Modi¹  U N Trivedi¹ 

[1] Department of Physics, Saurashtra University, Rajkot 360 005, India$$

关键词: Ferrites;    canted spin structure;    Mössbauer spectroscopy.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

In order to study the effect of substitution of Fe3+ by Al3+ and Cr3+ in Li0.5Fe2.5O4 on its structural and magnetic properties, the spinel system Li0.5Al𝑥Cr𝑥Fe2.5-2𝑥O4 (𝑥 = 0.0, 0.2, 0.4, 0.5, 0.6 and 0.8) has been characterized by X-ray diffraction, high field magnetization, low field ac susceptibility and 57Fe Mössbauer spectroscopy. Contrary to the earlier reports, about 50% of Al3+ is found to occupy the tetrahedral sites. The system exhibits canted spin structure and a central paramagnetic doublet was found superimposed on magnetic sextet in the Mössbauer spectra (𝑥 > 0.5).

【 授权许可】

Unknown