The studies of superconductor/ferromagnet (S/F) artificial heterostructures attract much attention. Using such structures it is possible to probe in detail the interplay between superconductivity and ferromagnetism. Recent theoretical model [1] predicts the existence of an indirect exchange coupling between ferromagnetic layers across the superconducting layers, similar to the coupling observed in giant magnetoresistance (GMR) systems.

The theory suggests that the most relevant heterostructures to observe such effect are structures built of layers of manganites with colossal magnetoresistance (CMR) and the high temperature superconductors (HTSC). In this talk we describe the experimental studies [2,3] of the structure, transport and magnetic properties of CMR/HTSC heterostructures, based on manganites La0.67Sr0.33MnO3 (LSMO) and superconductor YBa2Cu2O7 (YBCO). Experimental results support the existence of indirect exchange coupling. The interesting effects of interplay of superconductivity and magnetism in LSMO/YBCO will be presented.

[1] C.A.R. Sa de Melo Physica C 387, 17(2003).
[2] P. Przyslupski et al., J. Appl. Phys. 95,2906(2004).
[3] P. Przyslupski et al., Phys. Rev. B 69,134428(2004).

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/2334 must be provided.