Oxygen overdoping in superconducting and non-superconducting Y1-xPrxBa2Cu3Oy

LEVY G, MAIOROV B, CORVALAN MS, FAINSTEIN A, NIEVA G

PHYSICA B - CONDENSED MATTER

Año: 2002 vol. 320 p. 333 - 336

0921-4526

We present the evolution of magnetic and structural properties of Y1-xPrxBa2Cu3Oy (xsimilar to0.5 and x = 1) single crystals and polycrystalline materials when the oxygen concentration y is varied from under- to overdoping. We have found a monotonous evolution of the Pr Neel temperature for x = 1 samples and a maximum of the superconducting critical temperature for the xsimilar to0.5 samples. The structural properties as detected by X-ray diffraction and Raman spectroscopy show no instabilities when crossing the optimal doping region as was found in the x = 0 material. (C) 2002 Elsevier Science B.V. All rights reserved.