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Phys. Rev. B 85, 020404(R) (2012) [5 pages]

Magnetism in nanometer-thick magnetite

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Matteo Monti1, Benito Santos1,*, Arantzazu Mascaraque2,3, Oscar Rodríguez de la Fuente2,3, Miguel Angel Niño4,†, Tevfik Onur Menteş4, Andrea Locatelli4, Kevin F. McCarty5, José F. Marco1, and Juan de la Figuera1,‡
1Instituto de Química-Física “Rocasolano,” CSIC, Madrid ES-28006, Spain
2Universidad Complutense de Madrid, Madrid ES-28040, Spain
3Unidad Asociada IQFR(CSIC)-UCM, Madrid ES-28040, Spain
4Sincrotrone Trieste S.C.p.A., Trieste IT-34149, Italy
5Sandia National Laboratories, Livermore, California 94550, USA

Received 21 October 2011; published 11 January 2012

The oldest known magnetic material, magnetite, is of current interest for use in spintronics as a thin film. An open question is how thin can magnetite films be and still retain the robust ferrimagnetism required for many applications. We have grown 1-nm-thick magnetite crystals and characterized them in situ by electron and photoelectron microscopies including selected-area x-ray circular dichroism. Well-defined magnetic patterns are observed in individual nanocrystals up to at least 520 K, establishing the retention of ferrimagnetism in magnetite two unit cells thick.

©2012 American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.85.020404
DOI:
10.1103/PhysRevB.85.020404
PACS:
75.70.-i, 75.47.Lx, 68.37.Nq, 78.20.Ls

*Present address: Elettra Sincrotrone S.C.p.A, Trieste, Italy.

†Present address: Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA), Madrid, Spain.

‡juan.delafiguera@iqfr.csic.es

 
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