Structure and magnetic properties of synthesized fine cerium dioxide nanoparticles

0490224 - FZÚ 2019 RIV NL eng J - Článek v odborném periodiku
Luňáček, J. - Životský, O. - Janoš, P. - Došek, M. - Chrobak, A. - Maryško, Miroslav - Buršík, Jiří - Jirásková, Yvonna
Structure and magnetic properties of synthesized fine cerium dioxide nanoparticles.
Journal of Alloys and Compounds. Roč. 753, Jul (2018), s. 167-175. ISSN 0925-8388. E-ISSN 1873-4669
Grant CEP: GA MŠMT(CZ) LQ1601
Institucionální podpora: RVO:68378271 ; RVO:68081723
Klíčová slova: Ce-O₂ * microstructure * Mossbauer spectroscopy * magnetic properties * Brillouin function
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.175, rok: 2018

Cerium dioxide, which is diamagnetic in its bulk crystalline fluorite form, exhibits ferromagnetism when prepared as a nanopowder. This characteristic has recently been ascribed to localized electron spin moments formed at oxygen vacancies near the nanoparticle surfaces. In the present study, a number of structure-sensitive and magnetic methods were applied to CeO2 nanopowders prepared from the carbonate precursor by treatment at different calcination temperatures. The low-temperature magnetization measurements subsequently performed via Fe-57 Mossbauer spectroscopy revealed the presence of small amounts of iron impurities in the samples as well as in the chemicals used to prepare them.
Trvalý link: http://hdl.handle.net/11104/0284493