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Neutron Diffraction Investigations of Magnetism in BiFeO 3 Epitaxial Films
Author(s) -
Ratcliff William,
Kan Daisuke,
Chen Wangchun,
Watson Shan,
Chi Songxue,
Erwin Ross,
McIntyre Garry J.,
Capelli Sylvia C.,
Takeuchi Ichiro
Publication year - 2011
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201002125
Subject(s) - materials science , neutron diffraction , magnetic structure , thin film , magnetism , epitaxy , antiferromagnetism , monoclinic crystal system , crystal structure , magnetic moment , condensed matter physics , crystallography , substrate (aquarium) , magnetic domain , relaxation (psychology) , nuclear magnetic resonance , magnetization , nanotechnology , magnetic field , layer (electronics) , chemistry , psychology , social psychology , physics , oceanography , quantum mechanics , geology
The recovery of a modulated magnetic structure in epitaxial BiFeO 3 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 BiFeO 3 thin film cause drastic changes in the magnetic structure.