Exchange bias at low fields exhibited by the interface between epitaxial layers of ferromagnetic and charge-ordered rare-earth manganites

Rana Saha, K. Vasu, D. S. Negi, R. Datta, A. Sundaresan, C. N.R. Rao

Research output: Contribution to journalArticlepeer-review

Abstract

Epitaxial thin films of ferromagnetic La0.7Sr0.3MnO3 (LSMO) and charge-ordered, antiferromagnetic Y0.5Ca0.5MnO3 (YCMO) were deposited on SrTiO3 (100) substrates by pulsed laser deposition (PLD). The heterostructure undergoes tetragonal distortion due to strong biaxial tensile strain imposed by the substrate. The LSMO–YCMO bilayers exhibit significant exchange bias (EB) across the interface even in a very small remnant magnetic field (∼5 Oe) present in the superconductor magnet. The unidirectional exchange anisotropy at the interface can be switched by reversing the polarity of the remnant magnetic field. (Figure presented.) Significant asymmetry in the M (H) loop is exhibited by the heterostructure interface under cooling in the presence of small remnant magnetic field (Hr ∼ 5 Oe).

Original languageEnglish
Pages (from-to)622-626
Number of pages5
JournalPhysica Status Solidi - Rapid Research Letters
Volume10
Issue number8
DOIs
StatePublished - 1 Aug 2016
Externally publishedYes

Keywords

  • charge order
  • electron microscopy
  • exchange anisotropy
  • heterostructures
  • interfaces
  • oxides

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics

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