Počet záznamů: 1

Structure and electric transport in LaCo.sub.0.67./sub.Cu.sub.0.33./sub.O.sub.3./sub..

  1. 1.
    0359398 - FZU-D 2012 RIV US eng J - Článek v odborném periodiku
    Dlouhá, M. - Hejtmánek, Jiří - Jirák, Zdeněk - Knížek, Karel - Veverka, Miroslav - Vratislav, S.
    Structure and electric transport in LaCo0.67Cu0.33O3.
    Journal of Superconductivity and Novel Magnetism. Roč. 24, 1-2 (2011), s. 747-751 ISSN 1557-1939
    Grant CEP: GA ČR GA202/09/0421
    Výzkumný záměr: CEZ:AV0Z10100521
    Klíčová slova: electrical transpor * variable range hopping * transition metal oxides * perovskite cobaltites * neutron diffraction
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 0.650, rok: 2011

    The compound LaCo0.67Cu0.33O3.possessing the crystal structure of the rhombohedral perovskite type has been studied by means of the X-ray and neutron diffraction, magnetic and electric transport measurements. Four different regimes of the electric transport are identified in the course of temperature in the 3-1100 K range: (i) the variable range hopping at the lowest temperatures, (ii) a region of nearly constant thermopower and non-standard resistivity of power-law temperature dependence, followed by (iii) the resistivity and thermopower is of a conventional activated type known for classical hopping, and (iv) a gradual transition to a metallic-like transport at the highest temperatures.
    Trvalý link: http://hdl.handle.net/11104/0197195