Size dependent structural and magnetic behaviour of CaFe2O4

Autor:	P. K. Sharma, Arvind Samariya, S. P. Pareek, S. N. Dolia, Arun S. Prasad, Sudhish Kumar, M. S. Dhawan
Rok vydání:	2013
Předmět:	Spinel Analytical chemistry General Physics and Astronomy Coercivity engineering.material Nanocrystalline material law.invention SQUID Nuclear magnetic resonance Remanence law Mössbauer spectroscopy engineering General Materials Science Orthorhombic crystal system Superparamagnetism
Zdroj:	Current Applied Physics. 13:830-835
ISSN:	1567-1739
DOI:	10.1016/j.cap.2012.12.009
Popis:	CaFe2O4 nanocrystalline powders were synthesized through sol–gel treatment in which the stoichiometric mixing of various nitrates involving calcium and iron in presence of citric acid was performed. Subsequently, the as prepared sample was annealed at various temperatures in order to obtain the fine distribution of size including the bulk counterpart. The samples were then characterized using powder X-ray diffraction followed by 57Fe Mossbauer spectroscopy, SQUID as well as vibrating sample magnetometry. The results of spectroanalyses revealed that the samples were formed in single phase cubic spinel structure and exhibits room temperature superparamagnetism, except the bulk one, which crystallizes in characteristic orthorhombic structure of CaFe2O4 and displays trivial coercivity and remanent magnetization at room temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6403bc15317f5e13f17c25b99a1d5b67 https://doi.org/10.1016/j.cap.2012.12.009 Zobrazit plný text záznamu Full Text from ScienceDirect