physica status solidi (a) · 2003 · 11 citations · 0 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMaterials PhysicsSolid State PhysicsDefects In Electronic MaterialsDopingSuperconducting MaterialsCarrier Transport MechanismsCuprate SuperconductorsDoping EffectsDoping MechanismsHigh-temperature SuperconductivityHigh-temperature SuperconductorsRaman Spectra
The present work investigates the effect of a Sb substitution on the structure and the transport properties of the Ru1–xSbxSr2Gd1.4Ce0.6Cu2O10–δ system. X-ray photoelectron spectroscopy (XPS) data indicate that Sb doping increases the hole concentration in the CuO2 planes. The onset superconducting transition temperature is found to decrease from 42 K for x = 0.00 to 19 K for x = 0.07. This result may be caused by the hole overdoping effect due to Sb doping. The charge transfer and structural changes induced by Sb doping are reflected in the characteristics of Raman spectra at room temperature.