Magnetic Properties of CoFe2O4–BaTiO3 Composites

0387487 - ÚFM 2013 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Čuda, J. - Mousa, I. - David, Bohumil - Pizúrová, Naděžda - Tuček, J. - Žák, Tomáš - Mašláň, M. - Schneeweiss, Oldřich
Magnetic Properties of CoFe2O4–BaTiO3 Composites.
Mossbauer Spectroscopy in Materials Science - 2012. Melville, NY: American Institue of Physics, 2012, s. 123-132. AIP Conference Proceedings, Vol. 1489. ISBN 978-0-7354-1101-2. ISSN 0094-243X.
[Mossbauer Spectroscopy in Materials Science /10./. Olomouc (CZ), 11.06.2012-15.06.2012]
Institucionální podpora: RVO:68081723
Klíčová slova: Barium titanate * Cobalt ferrite * Magnetic properties * Mossbauer spectroscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

The aim of the present work is to study how the volume (lattice parameters) changes of barium titanate, induced by a phase transition, which occurs by temperature sweeps, influence magnetic behavior of cobalt ferrite in their composites via inverse magnetostrictive (Villari) effect. Structure, phase composition, and magnetic properties were investigated using X-ray diffraction, Mössbauer spectroscopy, and temperature dependence of magnetization. The tetragonal-to-orthorhombic phase transition in barium titanate occurring at ~280 K on cooling can be observed in the zero-field cooled magnetization curve. The other phase transitions, i.e., tetragonal-to-cubic transition at ~390 K and orthorhombic-to-rhombohedral transition at ~178 K, were detected neither by magnetic nor by Mössbauer measurements.
Trvalý link: http://hdl.handle.net/11104/0216602