Magnetic coupling in La0.7Ca0.3MnO 3/YBa2Cu3O7/La0.7Ca 0.3MnO3 trilayers

N. M. Nemes, C. Visani, J. Garcia-Barriocanal, F. Y. Bruno, Z. Sefrioui, D. Arias, C. Leon, M. Garcia Hernandez, S. G E Te Velthuis, A. Hoffmann, J. Santamaria

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report on the interplay between ferromagnetism and superconductivity in trilayers La0.7Ca0.3MnO3/YBa2Cu 3O7/La0.7Ca0.3MnO3 made of half metallic manganite and high temperature superconductor cuprate. Samples with a fully oxygenated cuprate show a magnetic field interval where the magnetizations of the manganite are aligned antiparallel. A considerable magnetoresistance accompanies the switching between magnetization configurations (parallel vs. antiparallel) of the manganite moments. Suppression of the free carrier density of the cuprate which occurs upon oxygen depletion, results in deep modifications in the shape of the normal state hysteresis loops indicating that there may be a magnetic coupling mediated by free carrier density of the cuprate. This result outlines the importance of quasiparticle transmission in the interplay between ferromagnetism and superconductivity in this kind of samples.

Original languageEnglish (US)
Title of host publicationDiffusion in Materials - DIMAT2008
PublisherTrans Tech Publications Ltd
Pages303-309
Number of pages7
Volume289-292
ISBN (Print)3908451728, 9783908451723
DOIs
StatePublished - 2009
Event7th International Conference on Diffusion in Materials - Lanzarote, Spain
Duration: Oct 28 2008Oct 31 2008

Other

Other7th International Conference on Diffusion in Materials
CountrySpain
CityLanzarote
Period10/28/0810/31/08

Keywords

  • Ferromagnetism
  • Interfaces of complex oxides
  • Superconductivity

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