Izvorni znanstveni članak

https://doi.org/10.5562/cca2752

Mössbauer and Magnetic Properties of Coherently Mixed Magnetite-Cobalt Ferrite Grown by Infrared Pulsed-Laser Deposition

Juan de la Figuera orcid.org/0000-0002-7014-4777 ; Instituto de Química Física “Rocasolano”, CSIC, Madrid E-28006, Spain
Adrián Quesada ; Instituto de Cerámica y Vidrio, CSIC, Madrid E-28049, Spain
Laura Martín-García ; Instituto de Química Física “Rocasolano”, CSIC, Madrid E-28006, Spain
Mikel Sanz ; Instituto de Química Física “Rocasolano”, CSIC, Madrid E-28006, Spain
Mohamed Oujja ; Instituto de Química Física “Rocasolano”, CSIC, Madrid E-28006, Spain
Marta Castillejo ; Instituto de Química Física “Rocasolano”, CSIC, Madrid E-28006, Spain
Arantzazu Mascaraque ; Universidad Complutense de Madrid, Madrid E-28040, Spain
Alpha T. N’Diaye ; Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Michael Foerster ; ALBA Synchrotron Light Facility, CELLS, Barcelona ES-08290, Spain
Lucía Aballe ; ALBA Synchrotron Light Facility, CELLS, Barcelona ES-08290, Spain
José F. Marco ; Instituto de Química Física “Rocasolano”, CSIC, Madrid E-28006, Spain

Sažetak

We have studied the magnetic properties and the composition of cobalt ferrite single crystal films on SrTiO₃ : 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 establishing the coherent structural and magnetic properties of this biphase system.

Ključne riječi

cobalt ferrite; oxide spinels; pulsed laser deposition; Mössbauer spectroscopy

Hrčak ID:

151114

URI

https://hrcak.srce.hr/151114

Datum izdavanja:

31.12.2015.

Posjeta: 2.239 *