Intermediate structural phases in rare-earth substituted BiFeO3

V. A. Khomchenko; J. A. Paixão; D. A. Kiselev; A. L. Kholkin

doi:10.1016/j.materresbull.2009.12.018

Intermediate structural phases in rare-earth substituted BiFeO₃

V. A. Khomchenko^*
, J. A. Paixão
, D. A. Kiselev
, A. L. Kholkin

^*Corresponding author for this work

University of Coimbra
University of Aveiro

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The room-temperature crystal structure and local ferroelectric properties of Bi_0.85RE_0.15FeO₃ (RE = Sm, Gd, Dy) polycrystalline samples have been investigated by X-ray diffraction (XRD) and piezoresponse force microscopy (PFM) techniques. XRD measurements show that the rare-earth substitution causes the transformation of R3c structure typical of BiFeO₃ to yield orthorhombic phases with √2a × 2√2a × 2a and √2a × 2a × √2a superlattices (a is the parameter of the cubic perovskite subcell). Results of PFM investigations imply that both the orthorhombic phases are polar. The models describing crystal structure of the phases are discussed.

Original language	English
Pages (from-to)	416-419
Number of pages	4
Journal	Materials Research Bulletin
Volume	45
Issue number	4
DOIs	https://doi.org/10.1016/j.materresbull.2009.12.018
Publication status	Published - Apr 2010
Externally published	Yes

Keywords

A. Ceramics
C. Atomic force microscopy
C. X-ray diffraction
D. Crystal structure
D. Ferroelectricity

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10.1016/j.materresbull.2009.12.018

Cite this

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abstract = "The room-temperature crystal structure and local ferroelectric properties of Bi0.85RE0.15FeO3 (RE = Sm, Gd, Dy) polycrystalline samples have been investigated by X-ray diffraction (XRD) and piezoresponse force microscopy (PFM) techniques. XRD measurements show that the rare-earth substitution causes the transformation of R3c structure typical of BiFeO3 to yield orthorhombic phases with √2a × 2√2a × 2a and √2a × 2a × √2a superlattices (a is the parameter of the cubic perovskite subcell). Results of PFM investigations imply that both the orthorhombic phases are polar. The models describing crystal structure of the phases are discussed.",

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T1 - Intermediate structural phases in rare-earth substituted BiFeO3

AU - Khomchenko, V. A.

AU - Paixão, J. A.

AU - Kiselev, D. A.

AU - Kholkin, A. L.

PY - 2010/4

Y1 - 2010/4

N2 - The room-temperature crystal structure and local ferroelectric properties of Bi0.85RE0.15FeO3 (RE = Sm, Gd, Dy) polycrystalline samples have been investigated by X-ray diffraction (XRD) and piezoresponse force microscopy (PFM) techniques. XRD measurements show that the rare-earth substitution causes the transformation of R3c structure typical of BiFeO3 to yield orthorhombic phases with √2a × 2√2a × 2a and √2a × 2a × √2a superlattices (a is the parameter of the cubic perovskite subcell). Results of PFM investigations imply that both the orthorhombic phases are polar. The models describing crystal structure of the phases are discussed.

AB - The room-temperature crystal structure and local ferroelectric properties of Bi0.85RE0.15FeO3 (RE = Sm, Gd, Dy) polycrystalline samples have been investigated by X-ray diffraction (XRD) and piezoresponse force microscopy (PFM) techniques. XRD measurements show that the rare-earth substitution causes the transformation of R3c structure typical of BiFeO3 to yield orthorhombic phases with √2a × 2√2a × 2a and √2a × 2a × √2a superlattices (a is the parameter of the cubic perovskite subcell). Results of PFM investigations imply that both the orthorhombic phases are polar. The models describing crystal structure of the phases are discussed.

KW - A. Ceramics

KW - C. Atomic force microscopy

KW - C. X-ray diffraction

KW - D. Crystal structure

KW - D. Ferroelectricity

UR - https://www.scopus.com/pages/publications/76449106091

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DO - 10.1016/j.materresbull.2009.12.018

M3 - Article

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VL - 45

SP - 416

EP - 419

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 4

ER -

Intermediate structural phases in rare-earth substituted BiFeO₃

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Keywords

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