Mössbauer and magnetic properties of coherently mixed magnetite-cobalt ferrite grown by infrared pulsed-laser deposition
Figuera, Juan de la (Instituto de Química Física "Rocasolano")
Quesada, Adrian (Instituto de Cerámica y Vidrio (CSIC))
Martín García, Laura (Instituto de Química Física "Rocasolano")
Sanz, Mikel (Instituto de Química Física "Rocasolano")
Oujja, Mohamed (Instituto de Química Física "Rocasolano")
Castillejo, Marta (Instituto de Química Física "Rocasolano")
Mascaraque, Arantzazu (Universidad Complutense de Madrid)
N'Diaye, Alpha T. (ALBA Laboratori de Llum de Sincrotró)
Foerster, Michael (ALBA Laboratori de Llum de Sincrotró)
Aballe, Lucía (ALBA Laboratori de Llum de Sincrotró)
Marco, José F. (Instituto de Química Física "Rocasolano")

Date:	2015
Abstract:	We have studied the magnetic properties and the composition of cobalt ferrite single crystal films on SrTiO: 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.
Grants:	Ministerio de Economía y Competitividad MAT2012-38045-C04-01 Ministerio de Economía y Competitividad CTQ2013-43086-P Ministerio de Economía y Competitividad MAT2013-48009-C4-1-P Ministerio de Economía y Competitividad BES-2013-063396 European Commission 310516
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Cobalt ferrite ; Oxide spinels ; Pulsed laser deposition ; Mössbauer spectroscopy
Published in:	Croatica Chemica Acta, Vol. 88, Núm. 4 (December 2015) , p. 453-460, ISSN 1334-417X

DOI: 10.5562/cca2752

8 p, 1.5 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > The ALBA Synchrotron
Articles > Research articles
Articles > Published articles