Mossbauer and magnetic studies of Mn0.1Sr0.2Co0.7Fe2O4

0439088 - ÚACH 2015 RIV NL eng C - Konferenční příspěvek (zahraniční konf.)
Abdallah, H.M.I. - Msomi, J.Z. - Moyo, T. - Dolo, J.J. - Lančok, Adriana
Mossbauer and magnetic studies of Mn0.1Sr0.2Co0.7Fe2O4.
Hyperfine Interactions. Vol. 1-3. Dordrecht: Springer, 2011, s. 99-104. ISSN 0304-3843.
[Latin American Conference on the Applications of the Mossbauer Effect (LACAME) /12./. Lima (PE), 07.11.2010-12.11.2010]
Výzkumný záměr: CEZ:AV0Z40320502
Klíčová slova: Nanoparticles * Coercive fields * Mossbauer spectroscopy * Spin freezing
Kód oboru RIV: CA - Anorganická chemie

The magnetic properties of Mn0.1Sr0.2Co0.7Fe2O4 nanoferrite with particle size of about 8 nm were investigated using magnetization and Mossbauer spectroscopy measurements. The sample shows a large increase in coercive field from 0.045 kOe at room temperature to about 3.00 kOe at 4 K. Room temperature coercive fields increased with increase in the annealing temperature between 300 degrees C and 800 degrees C. Our results show evidence of transformation from single domain to multi-domain structure with thermal annealing.
Trvalý link: http://hdl.handle.net/11104/0242523