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Correlation between Geometrically Induced Oxygen Octahedral Tilts and Multiferroic Behaviors in BiFeO 3 Films
Author(s) -
Lee Sung Su,
Kim YoungMin,
Lee HyunJae,
Seo Okkyun,
Jeong Hu Young,
He Qian,
Borisevich Albina Y.,
Kang Boyoun,
Kwon Owoong,
Kang Seunghun,
Kim Yunseok,
Koo Tae Yeong,
Rhyee JongSoo,
Noh Do Young,
Cho Beongki,
Seo Ji Hui,
Lee Jun Hee,
Jo Ji Young
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201800839
Subject(s) - multiferroics , materials science , octahedron , ferroelectricity , perovskite (structure) , lattice (music) , oxygen , crystal structure , piezoelectricity , condensed matter physics , crystallography , nanotechnology , optoelectronics , composite material , dielectric , physics , chemistry , quantum mechanics , acoustics
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 (ABO 3 ), 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 BiFeO 3 thin films using strong oxygen octahedral coupling with bottom SrRuO 3 layers is reported, which opens up new possibilities of oxygen octahedral engineering.