Spin injection in perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers in magnetic fields

J. Z. Liu, T. Nojima, T. Nishizaki, N. Kobayashi

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Oxide heterostructures of perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers were made to study quasiparticle injection effects in high-Tc superconducting thin films. Transport measurements of the superconducting layer shows that the insulating layer between YBa2Cu3O7 and La0.7Ca0.3MnO3 is important for the spin injection effect. It is found that spin injection effect differs with different injection configurations and it becomes strong with decreasing temperature. Magnetic field was harmful to the spin injection effect. The effect becomes weak with the increasing of magnetic field. It even disappears at high temperature in high magnetic fields. These results can give a useful information to the application of a variety of high-Tc superconductor/ferromagnetic heterostructure based devices.

Original languageEnglish
Pages (from-to)1614-1617
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume357-360
DOIs
Publication statusPublished - 2001 Jan 1

Keywords

  • Heterostructure
  • High-T superconductors
  • Magnetic field
  • Spin injection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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