Conductivity and antiferromagnetism of CaCuO 2 thin films doped by Sr

Abstract The results of electrical and magnetic investigations of epitaxial Ca x Sr 1Àx CuO 2 (CSCO) thin films grown by pulsed laser deposition are presented. The experimental temperature dependence of the CSCO film conductivity at low doping level is well described by the 3-d Mott insulator model over a wide temperature range (4.2-300 K). A deviation from the model with changing of Sr concentration has been observed. The Neel temperature of the films, T N , was determined by electron paramagnetic resonance technique. The comparison of the obtained T N value with the one previously obtained for the CSCO powder sample could be caused by oxygen vacancies in the CSCO films. Nb/Au/Ca 1Àx Sr x CuO 2 /YBa 2 Cu 3 O 7Àd heterostructures have been fabricated and superconducting current has been observed at low temperatures