Suppressed magnetization in La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices

A. Hoffmann, S. G.E. Te Velthuis, Z. Sefrioui, J. Santamaría, M. R. Fitzsimmons, S. Park, M. Varela

Research output: Contribution to journalArticlepeer-review

Abstract

We studied the magnetic properties of La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices. Magnetometry showed that with increasing YBa2Cu3O7-δ layer thickness the saturation magnetization per La0.7Ca0.3MnO3 layer decreases. From polarized neutron reflectometry we determined that this magnetization reduction is due to an inhomogenous magnetization depth profile arising from the suppression of magnetization near the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface. Electron energy loss spectroscopy indicates an increased 3d band occupation of the Mn atoms in the La0.7Ca0.3MnO3 layers at the interface. Thus, the suppression of ferromagnetic order at the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface is most likely due to charge transfer between the two materials.

Original languageEnglish (US)
Article number140407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number14
DOIs
StatePublished - Oct 1 2005
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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