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Nature Research, Scientific Reports, 1(6), 2016

DOI: 10.1038/srep31870

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

Journal article published in 2016 by Mateusz Scigaj, Nico Dix, Jaume Gázquez, María Varela ORCID, Ignasi Fina ORCID, Neus Domingo, Gervasi Herranz, Vassil Skumryev, Josep Fontcuberta, Florencio Sánchez ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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.