INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Distinguishable effects of oxygen and rhenium in HgBa2CuO4+δ superconductors
Autor/es:
L. FÀBREGA; A. SERQUIS; J. FONTCUBERTA; A. CANEIRO
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Año: 2000 vol. 62 p. 4148 - 4153
ISSN:
0163-1829
Resumen:
Muon spin relaxation and magnetization experiments on Hg1-xRexBa2CuO4+δ ceramics with different oxygen and Re contents allow us to discern the effects of the incorporation of both elements in this superconductor. For all compositions, Tc and σ∼λ-2 are strongly dependent on δ and display a maximum at optimal doping. The optimal Tc and σ values are nearly independent of x, thus indicating that the Re substitution has only second order effects on the basic superconducting properties of this compound, near optimal doping. Samples with Re have higher oxygen contents, due to the high valence of this cation. However, the shift of the Tc(δ) and σ(δ) curves toward higher δ values as x increases suggests that the oxygen atoms coordinating the Re cations are less effective to doping than the excess oxygen atoms present in Re-free samples.