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Title: Change in the magnetic structure of (Bi,Sm)FeO{sub 3} thin films at the morphotropic phase boundary probed by neutron diffraction

We report on the evolution of the magnetic structure of BiFeO{sub 3} thin films grown on SrTiO{sub 3} substrates as a function of Sm doping. We determined the magnetic structure using neutron diffraction. We found that as Sm increases, the magnetic structure evolves from a cycloid to a G-type antiferromagnet at the morphotropic phase boundary, where there is a large piezoelectric response due to an electric-field induced structural transition. The occurrence of the magnetic structural transition at the morphotropic phase boundary offers another route towards room temperature multiferroic devices.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742 (United States)
  2. Paul Scherrer Institut, 5232 Villigen PSI (Switzerland)
  3. Institut Laue Langevin, BP 156, 38042 Grenoble (France)
  4. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
Publication Date:
OSTI Identifier:
22415221
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL materials; Journal Volume: 2; Journal Issue: 11; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; BISMUTH COMPOUNDS; CONCENTRATION RATIO; ELECTRIC FIELDS; FERRITES; IRON OXIDES; NEUTRON DIFFRACTION; PIEZOELECTRICITY; SAMARIUM COMPOUNDS; STRONTIUM TITANATES; SUBSTRATES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS