Low temperature Mössbauer studies on magnetic nanocomposites

Bulletin of materials science

K A Malini¹  M R Anantharaman¹  Ajay Gupta² 

[1] Department of Physics, Cochin University of Science and Technology, Cochin 682 022, India$$Department of Physics, Cochin University of Science and Technology, Cochin 682 022, IndiaDepartment of Physics, Cochin University of Science and Technology, Cochin 682 022, India$$;IUC-DAEF, Indore 452 017, India$$IUC-DAEF, Indore 452 017, IndiaIUC-DAEF, Indore 452 017, India$$

关键词: Magnetic nanocomposites;    Mössbauer spectroscopy;    ion exchange;    ð›�?-Fe2O3;    superparamagnetism.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Nanocomposites with magnetic components possessing nanometric dimensions, lying in the range 1â€�??10 nm, are found to be exhibiting superior physical properties with respect to their coarser sized counterparts. Magnetic nanocomposites based on gamma iron oxide embedded in a polymer matrix have been prepared and characterized. The behaviour of these samples at low temperatures have been studied using Mössbauer spectroscopy. Mössbauer studies indicate that the composites consist of very fine particles of ð›�?-Fe₂O₃ of which some amount exists in the superparamagnetic phase. The cycling of the preparative conditions were found to increase the amount of ð›�?-Fe₂O₃ in the matrix.

【 授权许可】

Unknown