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Structure, Ferroelectricity, and Magnetism in Self‐Assembled BiFeO 3 –CoFe 2 O 4 Nanocomposites on (110)‐LaAlO 3 Substrates
Author(s) -
Tian Guo,
Ojha Shuchi,
Ning Shuai,
Gao Xingsen,
Ross Caroline A.
Publication year - 2019
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201900012
Subject(s) - materials science , tetragonal crystal system , ferroelectricity , condensed matter physics , nanocomposite , magnetism , multiferroics , bismuth ferrite , nanoscopic scale , nanotechnology , crystallography , optoelectronics , crystal structure , chemistry , physics , dielectric
A strain‐driven BiFeO 3 (BFO) tetragonal to rhombohedral phase transition is demonstrated in self‐assembled BiFeO 3 ‐CoFe 2 O 4 (BFO‐CFO) nanocomposites on LaAlO 3 (110)‐oriented substrates with varying thickness. The CFO forms parallel nanoscale fin‐shaped structures within a BFO matrix. Out‐of‐plane lattice strain from the BFO/CFO interfaces stabilizes the BFO rhombohedral‐like phase. The BFO exhibits a range of ferroelectric textures including stripe domains and centered domain arrangements, and the magnetic anisotropy of CFO shows a thickness‐dependent reorientation.