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Structure and electric transport in LaCo.sub.0.67./sub.Cu.sub.0.33./sub.O.sub.3./sub..
- 1.0359398 - FZÚ 2012 RIV US eng J - Journal Article
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. E-ISSN 1557-1947
R&D Projects: GA ČR GA202/09/0421
Institutional research plan: CEZ:AV0Z10100521
Keywords : electrical transpor * variable range hopping * transition metal oxides * perovskite cobaltites * neutron diffraction
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.650, year: 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.
Permanent Link: http://hdl.handle.net/11104/0197195
Number of the records: 1