Navegação Ciências Exatas e da Terra por Autor "Kunzler, Julio Vitor"
Resultados 1-5 de 5
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Critical and gaussian conductivity fluctuations in yba2cu3o7-delta
Pureur Neto, Paulo; Costa, Rosangela Menegotto; Rodrigues Junior, Pedro; Schaf, Jacob; Kunzler, Julio Vitor (1993) [Artigo de periódico]We report on systematic conductivity fluctuation measurements on three different samp1es of YBa2Cu30 7 - δ • We show, using the temperature derivative of the resistivity and the logarithmic derivative ofthe conductivity ... -
Fluctuation conductivity and microscopic granularity in bi-based high-temperature superconductors
Jurelo, Alcione Roberto; Kunzler, Julio Vitor; Schaf, Jacob; Pureur Neto, Paulo; Rosenblatt, Jorge (1997) [Artigo de periódico]Systematic conductivity measurements near Tc in granular (Bi,Pb)-Sr-Ca-Cu-O superconductors are presented, and focus is given on the interplay between thermal fluctuations and disorder at micro- and mesoscopic levels. ... -
Glass behavior and the h-t phase diagram of the high-tc ceramic superconductors yba2cu3o7, euba2cu3o7 and gdba2cu3o7
Schaf, Jacob; Pureur Neto, Paulo; Kunzler, Julio Vitor (1989) [Artigo de periódico]We report systematic field-cooled (PC) and zero-field-cooled (ZPC) diamagnetic susceptibility measurements in polycrystalline samples of the high-Tc oxide superconductors RBa2Cu30 7, where R =Y, Eu, or Gd. We focus mainly ... -
Mossbauer effect study of cu/sub 2/mnal/sub 1-x/sn/sub x/ compounds
Dubiel, S.M.; Kunzler, Julio Vitor; Schreiner, Wido Herwig; Brandao, Delmar Estevam (1980) [Artigo de periódico]Results of a Mõssbauer effect study of a range of Cu2MnA1t-xSnx compounds are presented for x=0.05, 0.10, 0.15, 0.25, 0.50, and 0.75. The hyperfine magnetic field at Sn nuclei is proportional to a number of Sn atoms ... -
Nuclear-quadrupole interactions in perovskite-type compounds of hf/sup 181/ studied by the perturbed-angular-correlation technique
Andrade, Pedro da Rocha; Forker, Manfred; Rogers, John David; Kunzler, Julio Vitor (1972) [Artigo de periódico]Measurements of nuclear-quadrupole-interaction constants in perovskite-type compounds of PbHf03, SnHf03, CaHf03, and SrHf03 have been performed using the perturbed-angularcorrelation technique. A range of fundamental ...