Chemical compression and ferroic orders in La substituted BiFeO3

Chemical compression effects on the ferroic orders in La substituted BiFeO3 are studied by atomic pair distribution function analysis and structure modeling. While rhombohedral BiFeO3 exhibits ferroelectricity and antiferromagnetism (AF) with a cycloidal Fe spin arrangement leading to zero magnetiza...

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Bibliographic Details
Published in:Physical review materials 2023-05, Vol.7 (5)
Main Authors: Petkov, Valeri, Zafar, Adeel, Kenesei, Peter, Shastri, Sarvjit
Format: Article
Language:English
Subjects:
Ferroelasticity
Ferroelectricity
Magneto-dielectric effect
MATERIALS SCIENCE
Monte Carlo methods
X-ray diffraction
Online Access:Get full text
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Summary:Chemical compression effects on the ferroic orders in La substituted BiFeO3 are studied by atomic pair distribution function analysis and structure modeling. While rhombohedral BiFeO3 exhibits ferroelectricity and antiferromagnetism (AF) with a cycloidal Fe spin arrangement leading to zero magnetization, La substituted BiFeO3 exhibits a reduced lattice polarization, strengthened AF order, and an apparently suppressed spin cycloid leading to nonzero magnetization. In conclusion, the observed changes in the ferroic orders arise from the chemical compression induced changes in the octahedral rotation and ferroelectric displacement of Bi atoms, which appear as lattice degrees of freedom entangling the electronic and magnetic orders in BiFeO3.
ISSN:2475-9953
2475-9953