The onset of ferromagnetism and superconductivity in [La0.7Sr0.3MnO3(n u.c.)/YBa2Cu3O7(2 u.c.)]20 superlattices

J Phys Condens Matter. 2013 Sep 18;25(37):376001. doi: 10.1088/0953-8984/25/37/376001. Epub 2013 Aug 21.

Abstract

With the aim of studying the interface magnetism, the onset of ferromagnetism and the onset of the transition to the superconducting state a series of [La0.7Sr0.3MnO3(n u.c.)/YBa2Cu3O7(2 u.c.)]20 (LSMO/YBCO) superlattices with nominally varying layer thickness of the LSMO from one to four unit cells (u.c.) was prepared and characterized by x-ray diffraction, electronic transport, magnetization and ferromagnetic resonance measurements. Spontaneous magnetization was observed for a superlattice with four u.c. LSMO layer thickness in a multilayer structure. Superlattices with 3 u.c. of LSMO and lower layer thicknesses did not show a signature of ferromagnetism. The onset of superconductivity was observed for superlattices with one and two LSMO layer u.c. thickness.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Barium Compounds / chemistry*
  • Copper / chemistry*
  • Electric Conductivity*
  • Electron Spin Resonance Spectroscopy
  • Lanthanum / chemistry*
  • Magnetics*
  • Magnets*
  • Manganese Compounds / chemistry*
  • Materials Testing
  • Strontium / chemistry*
  • X-Ray Diffraction
  • Yttrium / chemistry*

Substances

  • Barium Compounds
  • Manganese Compounds
  • barium copper yttrium oxide
  • Yttrium
  • Lanthanum
  • Copper
  • Strontium