Počet záznamů: 1

Distribution of cations in nanosize and bulk Co-Zn ferrites

  1. 1.
    0367335 - FZU-D 2012 RIV GB eng J - Článek v odborném periodiku
    Veverka, Miroslav - Jirák, Zdeněk - Kaman, Ondřej - Knížek, Karel - Maryško, Miroslav - Pollert, Emil - Závěta, K. - Lančok, Adriana - Dlouhá, M. - Vratislav, S.
    Distribution of cations in nanosize and bulk Co-Zn ferrites.
    Nanotechnology. Roč. 22, č. 34 (2011), 345701/1-345701/7 ISSN 0957-4484
    Grant CEP: GA ČR GAP204/10/0035; GA ČR(CZ) GAP108/11/0807
    Výzkumný záměr: CEZ:AV0Z10100521; CEZ:AV0Z40320502
    Klíčová slova: cobalt zinc ferrites * nanoparticles distribution of cations
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 3.979, rok: 2011

    The structural and magnetic properties of Co1-xZnxFe2O4 ferrites (Co-Zn ferrites) are investigated in a narrow compositional range around x = 0.6, which is of interest because of applications in magnetic fluid hyperthermia. The study by x-ray and neutron diffraction, Mössbauer spectroscopy and magnetization measurements is done on nanoparticles prepared by the coprecipitation method and bulk samples sintered at high temperatures. In spite of the known preference of Zn2+ for tetrahedral (A) sites and Co2+ for octahedral [B] sites, the cations are distributed nearly evenly over the two sites of spinel structure and there is also a variable number of [B] site vacancies, making cobalt ions trivalent.
    Trvalý link: http://hdl.handle.net/11104/0202054