Magnetic and thermal analysis of MFe2O4 (M = Co, Mn, Zn) nanoparticles

Autor:	Tomoyuki Hiroki, Yuko Ichiyanagi, Shinji Kimura, Daiki Shigeoka, Yuki Moro, Hikaru Katayanagi, Toshiyuki Mashino
Rok vydání:	2009
Předmět:	Thermogravimetry Thermogravimetric analysis Aqueous solution Chemistry Differential thermal analysis Inorganic chemistry Nanoparticle Magnetic nanoparticles Particle size Physical and Theoretical Chemistry Condensed Matter Physics Thermal analysis Nuclear chemistry
Zdroj:	Journal of Thermal Analysis and Calorimetry. 99:83-86
ISSN:	1572-8943 1388-6150
DOI:	10.1007/s10973-009-0564-8
Popis:	Magnetic nanoparticles were prepared by a wet chemical method. Precursors of MFe2O4 (M = Co, Mn, Zn) were prepared from a mixture of metal chloride and metasilicate nonahydrate aqueous solutions. The precipitates obtained in the wet chemical method were calcined to obtain MFe2O4 nanoparticles encapsulated by amorphous SiO2. The blocking temperatures T B’s were between 20 and 320 K, in this temperature range, the anisotropy energy of the particles decreased below their thermal energy. T B increased with the particle size. In order to clarify the nanoparticle formation process, differential thermal analysis and thermogravimetric (TG-DTA) measurements were performed for the as-prepared samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::83b2a45d5ce71c68fdeebb2f9422fc7f https://doi.org/10.1007/s10973-009-0564-8 Zobrazit plný text záznamu Full text from SpringerLink