Strain engineering magnetic frustration in perovskite oxide thin films

Abstract

Our first-principles results show that geometric frustration can be induced in thin films of multiferroic BiFeO3. We find that competing magnetic interactions occur in the so-called super-tetragonal phase of this material, which can be grown on strongly-compressive substrates. We show that the frustration level can be tuned by appropriately choosing the substrate; in fact, the three-dimensional spin order gets totally annihilated in a narrow range of epitaxial strains. We argue that the effects revealed here are not exclusive to BiFeO3, and predict that they also occur in multiferroic BiCoO3.

5 pages with 4 figures embedded. More information at http://www.icmab.es/leem/jorge

References in corpus (2)

• Stress-induced R-MA-MC-T symmetry changes in BiFeO3 films
• Frustrated spin-1/2 square lattice in the layered perovskite PbVO(3)

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