2003/06/25 by R.N. Bhowmik, R. N. Bhowmik, Bhowmik, R. N. +4
Engineering · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Magneto-Optical Properties and Applications #Multiferroics and related materials #Soft Condensed Matter (cond-mat.soft) #cond-mat.dis-nn #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.cond-mat/0306653
LaTex file and 9 ps Figures
arxiv created 2003/06/25 · openalex publication_date 2003/06/25 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Earlier investigation of Co0.2Zn0.8Fe1.95Ho0.05O4 spinel has shown the existence of "super-ferromagnetic " clusters containing Fe3+ and Ho3+ ions along with small size clusters of Fe3+ ions (Bhowmik et al, J. Magn. Magn. Mater. 247, 83 (2002)). Here, We report the static magnetic response of these clusters. The experimental data suggests some interesting magnetic features, such as, enhancement of magnetization; re-entrant magnetic transitions with paramagnetic to ferromagnetic state below 225 K and ferromagnetic to spin glass state below 120 K; appearance of field induced ferromagnetism. We also observe an unusual maximum in the thermoremanent magnetization (TRM) vs temperature data. Our measurements suggest that this unusuality in TRM is related to the blocking of "super-ferromagnetic" clusters ,out of the ferromagnetic state, along their local anisotropy axis.