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Resistivity of EuBa2(Cu1−yZny)3Ox as a function of temperature, magnetic field, pressure and Zn concentration

Abstract

We report electrical resistance and magnetoresistance measurements on EuBa2(Cu1-yZny)3Ox under pressures to 17 kbar. With Zn substitution, Tc is depressed rapidly (∼19 K/ at.% Zn) and there are qualitative changes in the temperature and field response of the resistance. Pressure drives the Zn-substituted samples toward undoped EuBa2Cu3Ox behavior. Analysis of the temperature dependent resistance for y=0.05 and P=0, together with Hall effect and thermopower data, suggests that the suppression of superconductivity may arise from weak three-dimensional localization promoted by Coulomb interactions. © 1987.

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