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

^*Šī darba korespondējošais autors

University of Coimbra
University of Aveiro

Zinātniskās darbības rezultāts: Devums žurnālam › Zinātniskais raksts (žurnālā) › koleģiāli recenzēts

32 Atsauces (Scopus)

Kopsavilkums

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.

Oriģinālvaloda	Angļu
Lapas (no-līdz)	416-419
Lapu skaits	4
Žurnāls	Materials Research Bulletin
Sējums	45
Izdevuma numurs	4
DOIs	https://doi.org/10.1016/j.materresbull.2009.12.018
Publikācijas statuss	Publicēts - apr. 2010
Ārēji publicēts	Jā

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10.1016/j.materresbull.2009.12.018

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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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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.

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