Počet záznamů: 1  

Magnetic and transport properties of CePt.sub.3./sub.Ge Kondo lattice in crystallineand sub-micron state

  1. 1.
    0386942 - FZU-D 2013 RIV NL eng J - Článek v odborném periodiku
    Poltierová Vejpravová, Jana - Prokleška, J. - Pospíšil, J. - Kitazawa, H. - Goncalves, A.P. - Komatsubara, T. - Ritter, C. - Isnard, O. - Sechovský, V.
    Magnetic and transport properties of CePt3Ge Kondo lattice in crystallineand sub-micron state.
    Journal of Alloys and Compounds. Roč. 520, Apr (2012), s. 22-29. ISSN 0925-8388
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: CePt3Ge * Kondo lattice * short-range magnetic order * size effect
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 2.390, rok: 2012

    We have studied a ternary phase of the CePt3±xGe composition, with the maximum values of x=0.2. A series of samples was prepared by arc melting, Czochralski method and splat cooling, and characterized by scanning electron microscopy and X-ray diffraction. The arc-melted samples are well-crystalline and single-phase with slightly varying stoichiometry close to the nominal CePt3Ge, while the splat-cooled samples form an amorphous or a nanocrystalline constitution of the CePt3Ge composition. Measurements of magnetization, specific heat and electrical resistivity were performed in the temp. 0.40 K - 300 K, and magnetic fields up to 9 T. A delicate neutron diffraction experiment down to 70 mK was done, which excluded long-range magnetic order in the CePt3Ge compound. The experiments evidenced, that the CePt3Ge compound can be considered as a Kondo lattice with low-temperature magnetic correlations, and the size effect seems to have minor role in control of the Kondo scattering phenomena.
    Trvalý link: http://hdl.handle.net/11104/0216189