Listar Ciencias Exactas y Naturales por autor "Pureur Neto, Paulo"
Mostrando ítems 21-27 de 27
-
Pairing transition, coherence transition, and the irreversibility line in granular GdBa/sub 2/Cu/sub 3/O/sub 7-[delta]/
Roa-Rojas, Jairo; Costa, Rosangela Menegotto; Pureur Neto, Paulo; Prieto, Pedro (2000) [Artículo de periódico]We report on electrical magnetoconductivity experiments near the superconducting transition of a granular sample of GdBa₂Cu₃O₇₋₈. The measurements were performed in magnetic fields ranging from 0 to 500 Oe applied parallel ... -
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/
Dias, Fabio Teixeira; Pureur Neto, Paulo; Rodrigues Junior, Pedro; Obradors, Xavier (2004) [Artículo de periódico]We report on systematic field-cooled magnetization experiments in five different melt-textured YBa2Cu3O7 samples containing large amounts of Y2BaCuO5 precipitates. These composites were grown with the Bridgman or top-seeding ... -
Quadrupole scattering in PrAl/sub 2/
Sablik, M.J.; Pureur Neto, Paulo; Creuzet, G.; Fert, Albert R.; Levy, Peter M. (1983) [Artículo de periódico]We derive the spontaneous anisotropy of the resistivity of the ferromagnetic compound PrAh from magnetoresistance measurements on a single crystal of PrAlz. We ascribe this spontaneous anisotropy of the resistivity to ... -
Rare-earth spin-glasses with uniaxial anisotropy
Baberschke, Klaus; Pureur Neto, Paulo; Fert, Albert R.; Wendler, R.; Senoussi, Sadok (1984) [Artículo de periódico]The properties of spin-glasses with uniaxial anisotropy are investigated by magnetization measurements on single crysta1s of Y and Se doped with Er, Dy, Tb, or Gd impurities. In alloys with strong anisotropy, spin-glass ... -
Separated suppression of the transverse and longitudinal Josephson flux mobility in a Bi/sub 1.6/Pb/sub 0.4/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub y/ superconductor
Jurelo, Alcione Roberto; Pureur Neto, Paulo; Schaf, Jacob (2001) [Artículo de periódico]We report on very detailed zero-field-cooling and field-cooling magnetization and magnetoresistance measurements in a polycrystalline Bi₁.₆Pb₀.₄Sr₂Ca₂Cu₃Oy superconductor. The results allow us to study the irreversibility ... -
Spin texture on top of flux avalanches in Nb/Al2O3/Co thin film heterostructures
Lopes, Rovan Fernandes; Carmo, Danusa do; Colauto, Fabiano; Ortiz, Wilson Aires; Andrade, Antonio Marcos Helgueira de; Johansen, Tom Henning; Baggio-Saitovitch, E.; Pureur Neto, Paulo (2017) [Artículo de periódico]We report on magneto-optical imaging, magnetization, Hall effect, and magneto-resistance experiments in Nb/Al2O3/Co thin film heterostructures. The magneto-transport measurements were performed in samples where electrical ... -
Unconventional superconducting granularity of the Y/sub 1-x/Pr/sub x/Ba/sub 2/Cu/sub 3/O/sub 7-[delta]/ compound
Barros, Fábio Martins; Pureur Neto, Paulo; Schaf, Jacob; Fabris, Frederik Wolff; Vieira, Valdemar das Neves; Jurelo, Alcione Roberto; Cantão, Mauricio Pereira (2006) [Artículo de periódico]We report on fluctuation magnetoconductivity and magnetic irreversibility of Y1−xPrxBa2Cu3O7− single crystals and a polycrystalline sample. Although our samples are all single phase orthorhombic and the single crystals ...