Structural Transformation Pathways of Multiferroic BiFeO3 under High Pressures
Journal Article
·
· Journal of Physical Chemistry. C
- Wuhan Univ. of Technology, Hubei (China)
High-pressure phase transitions in multiferroic BiFeO3 have been investigated by synchrotron radiation X-ray diffraction up to ~54 GPa at room temperature. BiFeO3 exhibits a complex structural behavior under high pressures. Four phase transitions with the phase sequence R3c → OI and OIII → OI → Pnma → Pnm21 were observed at ~3, ~6, ~12, and ~45 GPa, respectively. Because of octahedral tilts and cation displacements under high pressures, BiFeO3 presents large unit cells and complex superstructures or domain structures between the stable R3c and Pnma phases. The OI and OIII phases have superstructure lattices √2apc x 3√2bpc x cpc and √2apc x 2√2bpc x 2cpc, respectively, and the OIII phase is isostructural with antiferroelectric PbZrO3 (space group: Pbam). Here, the Pnma → Pnm21 transition at ~45 GPa indicates the occurrence of a large unit cell and an increase of the structural distortion. The Pnm21 phase with a superstructure lattice 2√2apc x 2bpc x √2cpc has a group–subgroup relation with the Pnma phase.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- NSF; National Natural Science Foundation of China; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-06CH11357; FG02-94ER14466
- OSTI ID:
- 1434715
- Journal Information:
- Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 12 Vol. 122; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Progress in BiFeO 3 -based heterostructures: materials, properties and applications
|
journal | January 2020 |
Similar Records
Phase transitions, domain structure, and pseudosymmetry in La- and Ti-doped BiFeO{sub 3}
Nd-doped BiFeO{sub 3} ceramics with antipolar order
Phase formation in the (1-y)BiFeO{sub 3}-yBiScO{sub 3} system under ambient and high pressure
Journal Article
·
Sat Feb 06 23:00:00 EST 2016
· Journal of Applied Physics
·
OSTI ID:22494971
Nd-doped BiFeO{sub 3} ceramics with antipolar order
Journal Article
·
Mon Mar 16 00:00:00 EDT 2009
· Applied Physics Letters
·
OSTI ID:21176047
Phase formation in the (1-y)BiFeO{sub 3}-yBiScO{sub 3} system under ambient and high pressure
Journal Article
·
Wed Mar 15 00:00:00 EDT 2017
· Journal of Solid State Chemistry
·
OSTI ID:22658223