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American Physical Society, Physical review B, 2(85)

DOI: 10.1103/physrevb.85.020404

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Magnetism in nanometer-thick magnetite

Journal article published in 2012 by Matteo Monti, Benito Santos, Arantzazu Mascaraque, Oscar Rodríguez de la Fuente, Miguel Angel Niño ORCID, Tevfik Onur Menteş, Andrea Locatelli ORCID, Kevin F. McCarty, José F. Marco, Juan de la Figuera
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This paper is available in a repository.

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Abstract

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.