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Title: Photo-induced Low Temperature Structural Transition in the "114" YbaFe4O7 oxide

Synchrotron irradiation of the oxide YBaFe4O7.0 below 190 K converts the low temperature monoclinic structure to a higher symmetry tetragonal form analogous to the room temperature structure. This photo-induced metastable tetragonal form is stable even in the absence of irradiation over the range 4-60 K, however, above 60 K the photo-transition is reversible. These structural phenomena are correlated to the magnetic behaviour of this system, suggesting possible spin-lattice coupling. Lastly, a scenario explaining the low temperature photo-induced transition is proposed, based on the different distributions of the valence electrons in the iron sub-lattice of the monoclinic and tetragonal phases.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3]
  1. Laboratoire de cristallographie et sciences des materiaux (CRISMAT), Caen (France)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
OSTI Identifier:
1114911
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Solid State Communications
Additional Journal Information:
Journal Volume: 182; Journal Issue: 2014; Journal ID: ISSN 0038-1098
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; photo-induced transition; iron oxide; powder diffraction; 114 structure