Spin dependent transport at oxide La0.7Ca0.3MnO3/YBa2Cu3O7 ferromagnet/superconductor interfaces

V. Peña, N. Nemes, C. Visani, F. Y. Bruno, D. Arias, Z. Sefrioui, C. Leon, S. G.E. Te Velthuis, A. Hoffmann, M. Garcia-Hernandez, J. L. Martinez, J. Santamaría

Research output: Contribution to journalArticle

Abstract

We have found large magnetoresistance in ferromagnet/superconductor/ferromagnet heterostructures made of La0.7Ca0.3MnO3 and YBa2Cu3O7. It originates at an increase of the width of the resistive transition when the magnetizations of the ferromagnetic layers are aligned antiparallel. We find that the shape and height of the magnetoresistance peaks are not modified when the angle between current and magnetic field is changed from parallel or perpendicular. Furthermore, we find that the temperature shift of the resistance curves is independent of the current values. This favors the view that the magnetoresistance phenomenon originates at the spin dependent transport of quasiparticles transmitted from the ferromagnetic electrodes into the superconductor, and rules out interpretations in terms of spontaneous vortices or anisotropic magnetoresistance of the ferromagnetic layers.

Original languageEnglish (US)
Pages (from-to)3967-3970
Number of pages4
JournalJournal of the European Ceramic Society
Volume27
Issue number13-15
DOIs
StatePublished - Jul 6 2007
Externally publishedYes

Keywords

  • Films
  • Interfaces
  • Magnetic properties
  • Superconductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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  • Cite this

    Peña, V., Nemes, N., Visani, C., Bruno, F. Y., Arias, D., Sefrioui, Z., Leon, C., Te Velthuis, S. G. E., Hoffmann, A., Garcia-Hernandez, M., Martinez, J. L., & Santamaría, J. (2007). Spin dependent transport at oxide La0.7Ca0.3MnO3/YBa2Cu3O7 ferromagnet/superconductor interfaces. Journal of the European Ceramic Society, 27(13-15), 3967-3970. https://doi.org/10.1016/j.jeurceramsoc.2007.02.076