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Conductivity and antiferromagnetism of CaCuO2 thin films doped by Sr

Ovsyannikov, Gennady A. and Demidov, Viktor V. and Kislinski, Yuli V. and Komissinski, Philippe V. and Winkler, Dag (2007):
Conductivity and antiferromagnetism of CaCuO2 thin films doped by Sr.
In: Physica C: Superconductivity, pp. 536-537, 460-46, ISSN 09214534,
[Online-Edition: http://dx.doi.org/10.1016/j.physc.2007.03.144],
[Article]

Abstract

The results of electrical and magnetic investigations of epitaxial CaxSr1−xCuO2 (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, TN, was determined by electron paramagnetic resonance technique. The comparison of the obtained TN value with the one previously obtained for the CSCO powder sample could be caused by oxygen vacancies in the CSCO films. Nb/Au/Ca1−xSrxCuO2/YBa2Cu3O7−δ heterostructures have been fabricated and superconducting current has been observed at low temperatures.

Item Type: Article
Erschienen: 2007
Creators: Ovsyannikov, Gennady A. and Demidov, Viktor V. and Kislinski, Yuli V. and Komissinski, Philippe V. and Winkler, Dag
Title: Conductivity and antiferromagnetism of CaCuO2 thin films doped by Sr
Language: English
Abstract:

The results of electrical and magnetic investigations of epitaxial CaxSr1−xCuO2 (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, TN, was determined by electron paramagnetic resonance technique. The comparison of the obtained TN value with the one previously obtained for the CSCO powder sample could be caused by oxygen vacancies in the CSCO films. Nb/Au/Ca1−xSrxCuO2/YBa2Cu3O7−δ heterostructures have been fabricated and superconducting current has been observed at low temperatures.

Journal or Publication Title: Physica C: Superconductivity
Volume: 460-46
Uncontrolled Keywords: Cuprates , Superconductivity; Antiferromagnetic; Electron paramagnetic resonance
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 29 Mar 2012 08:43
Official URL: http://dx.doi.org/10.1016/j.physc.2007.03.144
Identification Number: doi:10.1016/j.physc.2007.03.144
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