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Monolithic integration of roomtemperature multifunctional BaTiO3-CoFe2O4 epitaxial heterostructures on Si(001)

AuthorsScigaj, Mateusz ; Dix, Nico ; Gázquez, Jaume ; Varela, María; Fina, Ignasi ; Domingo, Neus ; Herranz, Gervasi ; Skumryev, Vassil; Fontcuberta, Josep ; Sánchez Barrera, Florencio
Issue Date23-Aug-2016
PublisherNature Publishing Group
CitationScientific Reports 6: 31870 (2016)
AbstractThe multifunctional (ferromagnetic and ferroelectric) response at room temperature that is elusive in single phase multiferroic materials can be achieved in a proper combination of ferroelectric perovskites and ferrimagnetic spinel oxides in horizontal heterostructures. In this work, lead-free CoFe2O4/BaTiO3 bilayers are integrated with Si(001) using LaNiO3/CeO2/YSZ as a tri-layer buffer. They present structural and functional properties close to those achieved on perovskite substrates: the bilayers are fully epitaxial with extremely flat surface, and exhibit robust ferromagnetism and ferroelectricity at room temperature.
Publisher version (URL)http://dx.doi.org/10.1038/srep31870
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