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Tuning order-by-disorder multiferroicity in CuO by doping
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2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 90, no 1, 014437- p.Article in journal (Refereed) Published
Abstract [en]

The high Curie temperature multiferroic compound CuO has a quasidegenerate magnetic ground state that makes it prone to manipulation by the so-called "order-by-disorder" mechanism. First principle computations supplemented with Monte Carlo simulations and experiments show that isovalent doping allows us to stabilize the multiferroic phase in nonferroelectric regions of the pristine material phase diagram with experiments reaching a 250% widening of the ferroelectric temperature window with 5% of Zn doping. Our results allow us to validate the importance of a quasidegenerate ground state on promoting multiferroicity on CuO at high temperatures and open a path to the material engineering of multiferroic materials. In addition we present a complete explanation of the CuO phase diagram and a computation on the incommensurability in excellent agreement with experiment without free parameters.

Place, publisher, year, edition, pages
2014. Vol. 90, no 1, 014437- p.
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Condensed Matter Physics
URN: urn:nbn:se:kth:diva-153279DOI: 10.1103/PhysRevB.90.014437ISI: 000341310400003ScopusID: 2-s2.0-84905393633OAI: diva2:752678

QC 20141006

Available from: 2014-10-06 Created: 2014-10-03 Last updated: 2014-10-06Bibliographically approved

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Bergqvist, Lars
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Material Physics, MF
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