Epitaxial stabilization of ε -Fe<inf>2</inf> O<inf>3</inf> (00l) thin films on SrTiO<inf>3</inf> (111)

M. Gich, J. Gazquez, A. Roig, A. Crespi, J. Fontcuberta, J. C. Idrobo, S. J. Pennycook, M. Varela, V. Skumryev, M. Varela

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59 Citations (Scopus)

Abstract

Thin films of the metastable and elusive ε -Fe2 O 3 have been epitaxially stabilized on SrTiO3 (111) substrates. The ε -Fe2 O3 films present a (001) orientation perpendicular to the substrate and three in-plane domains measuring a few nanometers and showing atomically sharp interfaces. We argue that this domain structure, rather than the epitaxial-strain, plays an essential role in stabilizing the ε -Fe2 O3 by minimizing the energy of (100) surfaces. The ε -Fe2 O3 films show a large in-plane coercivity ∼8 kOe which combined with the magnetoelectric character claimed for this oxide may lead to novel applications in spintronics. © 2010 American Institute of Physics.
Original languageEnglish
Article number112508
JournalApplied Physics Letters
Volume96
DOIs
Publication statusPublished - 26 Mar 2010

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