Correlation between Geometrically Induced Oxygen Octahedral Tilts and Multiferroic Behaviors in BiFeO3 Films

Sung Su Lee, Young Min Kim, Hyun Jae Lee, Okkyun Seo, Hu Young Jeong, Qian He, Albina Y. Borisevich, Boyoun Kang, Owoong Kwon, Seunghun Kang, Yunseok Kim, Tae Yeong Koo, Jong Soo Rhyee, Do Young Noh, Beongki Cho, Ji Hui Seo, Jun Hee Lee, Ji Young Jo

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23 Scopus citations

Abstract

The equilibrium position of atoms in a unit cell is directly connected to crystal functionalities, e.g., ferroelectricity, ferromagnetism, and piezoelectricity. The artificial tuning of the energy landscape can involve repositioning atoms as well as manipulating the functionalities of perovskites (ABO3), which are good model systems to test this legacy. Mechanical energy from external sources accommodating various clamping substrates is utilized to perturb the energy state of perovskite materials fabricated on the substrates and consequently change their functionalities; however, this approach yields undesired complex behaviors of perovskite crystals, such as lattice distortion, displacement of B atoms, and/or tilting of oxygen octahedra. Owing to complimentary collaborations between experimental and theoretical studies, the effects of both lattice distortion and displacement of B atoms are well understood so far, which leaves us a simple question: Can we exclusively control the positions of oxygen atoms in perovskites for functionality manipulation? Here the artificial manipulation of oxygen octahedral tilt angles within multiferroic BiFeO3 thin films using strong oxygen octahedral coupling with bottom SrRuO3 layers is reported, which opens up new possibilities of oxygen octahedral engineering.

Original languageEnglish
Article number1800839
JournalAdvanced Functional Materials
Volume28
Issue number19
DOIs
StatePublished - May 9 2018

Funding

S.S.L. and Y.-M.K. contributed equally to this work. J.Y.J. acknowledges support through grants from the National Research Foundation of Korea (NRF) funded by the Korean government (NRF-2014R1A1A3053111, NRF-2016R1D1A1A02937051, and NRF-2017K1A3A7A09016388), MSIP and PAL, GRI (GIST Research Institute) project by GIST, and Science Fellowship of POSCO TJ Foundation, Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2017M3D1A1040828), and National Strategic Project-Fine particle of the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT(MSIT), the Ministry of Environment (ME), and the Ministry of Health and Welfare (MOHW) (2017M3D8A1091937). Y.-M.K was supported by the Institute for Basic Science (IBS-R011-D1) and NRF grant (NRF-2015M3D1A1070672) for the Creative Materials Discovery Program in Korea. J.H.L., H.-J.L., and J.H.S. at UNIST were supported by National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP)(2015R1C1A1A01055760), Basic Research Laboratory (NRF2017R1A4A1015323), and Creative Materials Discovery Program through the NRF funded by the Ministry of Science and ICT(2017M3D1A1040828). Computation resources were supported by the Supercomputing Center/Korea Institute of Science and Technology Information with supercomputing resources including technical support (KSC-2017-C3-0018). Y.S.K. was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2017R1A2B2003342). Q.H. and A.Y.B. were sponsored by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. B.Y.K. and B.K.C. were supported by Bank for Quantum Electronic Materials.

Keywords

  • BiFeO
  • ferroelectrics
  • multiferroics
  • oxygen octahedral tilting
  • weak-ferromagnetics

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