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Title: Mössbauer and magnetic properties of coherently mixed magnetite-cobalt ferrite grown by infrared pulsed-laser deposition

We have studied the magnetic properties and the composition of cobalt ferrite single crystal films on SrTiO 3: Nb grown by infrared pulsed-laser deposition. Mössbauer spectra have been recorded from both the target used to grow the films and the films themselves. The Mössbauer spectra of the target taken at low temperatures show a strong dependence of the recoil free fraction of the octahedral sites with temperature. The films composition, with a coexistence of Co-enriched cobalt ferrite and magnetite, has been estimated assuming a similar ratio of the recoil free fractions of the films. X-ray absorption and x-ray magnetic circular dichroism measurements confirm the valence composition of the film and show ferromagnetic Fe-Co coupling in the films with a coercive field around 0.5 T at room temperature. The combination of these characterization techniques allows establishin g the coherent structural and magnetic properties of this biphase system.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [4] ;  [5] ;  [5] ;  [1]
  1. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Instituto de Quimica Fisica Rocasolano
  2. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain)
  3. Univ. Complutense Madrid (Spain)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. ALBA Synchrotron Light Facility, Barcelona (Spain)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Croatica Chemica Acta
Additional Journal Information:
Journal Volume: 88; Journal Issue: 4; Journal ID: ISSN 0011-1643
Publisher:
The Croatian Chemical Society
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (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; cobalt ferrite; oxide spinels; pulsed laser deposition; Mössbauer spectroscopy
OSTI Identifier:
1378671