Eur. Phys. J. B 40, 479-482 (2004)
https://doi.org/10.1140/epjb/e2004-00230-x

Long length scale interaction between magnetism and superconductivity in La_0.3Ca_0.7MnO₃/YBa₂Cu₃O₇ superlattices

¹ GFMC. Dpto. Fisica Aplicada III, Universidad Complutense de Madrid, 28040 Madrid, Spain
² Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC). 28049 Cantoblanco, Madrid

Corresponding author: ^a jacsan@fis.ucm.es

Received: 20 December 2003
Published online: 3 August 2004

Abstract

We examine the interplay between ferromagnetism and superconductivity in La_0.3Ca_0.7MnO₃/YBa₂Cu₃O₇ superlattices showing “coexistence” of magnetism and superconductivity. A depression of the critical temperature is observed when manganite layer thickness is increased between 0.9 and 8 nm, pointing to an interplay between ferromagnetism and superconductivity over nanometer length scales. The possibility of a ferromagnetic/superconducting proximity effect to explain these results is analyzed.