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Lee, Jun Hee
Quantum Materials for Energy Conversion Lab
Research Interests
  • Quantum simulation, photocatalyst, fuel cell, Li battery, materials genome, supercomputer

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

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Title
Correlation between Geometrically Induced Oxygen Octahedral Tilts and Multiferroic Behaviors in BiFeO3 Films
Author
Lee, Sung SuKim, Young-MinLee, Hyung-JaeSeo, OkkyunJeong, Hu YoungHe, QianBorisevich, Albina Y.Kang, BoyounKwon, OwoongKang, SeunghunKim, YunseokKoo, Tae YeongRhyee, Jong-SooNoh, Do YoungCho, BeongkiSeo, Ji HuiLee, Jun HeeJo, Ji Young
Keywords
BiFeO3; ferroelectrics; multiferroics; oxygen octahedral tilting; weak-ferromagnetics
Issue Date
201805
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.28, no.19, pp.1800839 -
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.
URI
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DOI
http://dx.doi.org/10.1002/adfm.201800839
ISSN
1616-301X
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UCRF_Journal Papers
ECHE_Journal Papers

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