5 papers · 1 filter
Elastic properties of polycrystalline YBa_2Cu_3O_7: Evidence for granularity induced martensitic behavior
C. Stari, A. Moreno-Gobbi, A. W. Mombru +4
In this work we present the study of the elastic properties of polycrystalline samples of superconducting YBa_2Cu_3O_7 prepared by the sol-gel method. The quality of all samples wa…
Magnetic and superconducting properties of RuSr2 Gd1.5Ce0.5Cu2O10-x samples: dependence on the oxygen content and ageing effects
C. A. Cardoso, A. J. C. Lanfredi, A. J. Chiquito +5
The magnetic and superconducting properties of RuSr2Gd1.5Ce0.5Cu2O10-x polycrystalline samples with different oxygen doping level are presented. A strong suppression of the superco…
High pressure high temperature (HPHT) synthesis and magnetization of Magneto-Superconducting RuSr2(LnCe2)Cu2O12.25 (Ru-1232) compounds (Ln = Y and Dy)
V. P. S. Awana, H. Kishan, T. Kawashima +2
RuSr2(LnCe2)Cu2O12.25 (Ru-1232) compounds with Ln = Y and Dy being synthesized by high pressure high temperature (6GPa, 12000C) solid state synthesis route do crystallize in space…
Revival of Superconductivity by Y3+/Ca2+ substitution in YBa2Cu2.7Co0.3O7 without reported phase transformation
M. A. Ansari, Rashmi Nigam, V. P. S. Awana +7
Results of phase formation, resistivity (r), and thermo-electric power (S), are reported on Y1-xCaxBa2Cu2.7Co0.3O7 compounds with x = 0.1 and 0.2. Pristine compound i.e. without Co…
Spin Glass Behavior in the Ru-1222 and Ru-1212 rutheno-cuprate families: a comparative study
C. A. Cardoso, F. M. Araujo-Moreira, V. P. S. Awana +3
Strong evidences of a spin glass phase on polycrystalline RuSr2Ln1.5Ce0.5Cu2O10-x (LnRu-1222, Ln = Y, Ho and Dy) is provided by ac susceptibility and dc magnetization measurements.…