Neutron Diffraction Investigations of Magnetism in BiFeO3 Epitaxial Films

Abstract

The recovery of a modulated magnetic structure in epitaxial BiFeO3 thin films as revealed by neutron diffraction is reported. The magnetic structure in thin films is found to strongly depend on substrate orientation. The substrate orientation causes different strain-relaxation processes resulting in different thin-film crystal structures. The (110) oriented film with a monoclinic structural phase has a single-domain modulated magnetic structure where the magnetic moment lies in the HHL plane. For the (111) oriented film that has a rhombohedral structure, a modulated structure superimposed on the G-type antiferromagnetic order is found. These results indicate that slight structural modifications in the BiFeO3 thin film cause drastic changes in the magnetic structure.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2011
Accession Number
ADA579028

Entities

People

  • Daisuke Kan
  • Garry J. Mcintyre
  • Ichiro Takeuchi
  • Ross Erwin
  • Shannon Watson
  • Songxue Chi
  • Sylvia C. Capelli
  • Wangchun Chen
  • William Ratcliff Ii

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Crystal Structure
  • Diffraction
  • Films
  • Geometry
  • Incoherent Scattering
  • Magnetic Domains
  • Magnetic Materials
  • Magnetic Moments
  • Materials
  • Materials Science
  • Measurement
  • Neutron Diffraction
  • Neutron Scattering
  • Nuclear Scattering
  • Research Facilities
  • Scattering
  • Thin Films

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Thin Film Deposition Science.