Lattice distortion at ferroelectric transition of YMn2O 5

I. Kagomiya; S. Matsumoto; K. Kohn; Y. Fukuda; T. Shoubu; H. Kimura; Y. Noda; N. Ikeda

doi:10.1080/00150190390206347

Lattice distortion at ferroelectric transition of YMn₂O ₅

I. Kagomiya, S. Matsumoto, K. Kohn, Y. Fukuda, T. Shoubu, H. Kimura, Y. Noda, N. Ikeda

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

72 Citations (Scopus)

Abstract

We conducted X-ray diffraction study of YMn 2 O 5 single crystals with an orbital - radiation X-ray source to determine the lattice distortions related to the ferroelectric phase transition. At present, no anomaly of temperature dependence of lattice parameters has been detected around the ferroelectric transition point T CE = 39 K within the accuracy of lattice parameters, ± 1 × 10⁴ Å. Moreover neither splitting of Bragg peaks nor appearance of a super lattice reflection were noticed below T CE . These facts indicate that ionic displacement at T CE is much smaller in YMn 2 O 5 than in typical ferroelectrics. On the basis of symmetry consideration, we discuss a possible ionic displacements at the ferroelectric transition.

Original language	English
Pages (from-to)	167-174
Number of pages	8
Journal	Ferroelectrics
Volume	286
DOIs	https://doi.org/10.1080/00150190390206347
Publication status	Published - Jun 1 2003
Externally published	Yes

Keywords

Lattice distortion
Representation analysis
RMn O
Simultaneously ferroelectric and antiferromagnetic crystal
Spontaneous polarization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Lattice distortion at ferroelectric transition of YMn2O 5",

abstract = "We conducted X-ray diffraction study of YMn 2 O 5 single crystals with an orbital - radiation X-ray source to determine the lattice distortions related to the ferroelectric phase transition. At present, no anomaly of temperature dependence of lattice parameters has been detected around the ferroelectric transition point T CE = 39 K within the accuracy of lattice parameters, ± 1 × 104 {\AA}. Moreover neither splitting of Bragg peaks nor appearance of a super lattice reflection were noticed below T CE . These facts indicate that ionic displacement at T CE is much smaller in YMn 2 O 5 than in typical ferroelectrics. On the basis of symmetry consideration, we discuss a possible ionic displacements at the ferroelectric transition.",

keywords = "Lattice distortion, Representation analysis, RMn O, Simultaneously ferroelectric and antiferromagnetic crystal, Spontaneous polarization",

author = "I. Kagomiya and S. Matsumoto and K. Kohn and Y. Fukuda and T. Shoubu and H. Kimura and Y. Noda and N. Ikeda",

year = "2003",

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doi = "10.1080/00150190390206347",

language = "English",

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T1 - Lattice distortion at ferroelectric transition of YMn2O 5

AU - Kagomiya, I.

AU - Matsumoto, S.

AU - Kohn, K.

AU - Fukuda, Y.

AU - Shoubu, T.

AU - Kimura, H.

AU - Noda, Y.

AU - Ikeda, N.

PY - 2003/6/1

Y1 - 2003/6/1

N2 - We conducted X-ray diffraction study of YMn 2 O 5 single crystals with an orbital - radiation X-ray source to determine the lattice distortions related to the ferroelectric phase transition. At present, no anomaly of temperature dependence of lattice parameters has been detected around the ferroelectric transition point T CE = 39 K within the accuracy of lattice parameters, ± 1 × 104 Å. Moreover neither splitting of Bragg peaks nor appearance of a super lattice reflection were noticed below T CE . These facts indicate that ionic displacement at T CE is much smaller in YMn 2 O 5 than in typical ferroelectrics. On the basis of symmetry consideration, we discuss a possible ionic displacements at the ferroelectric transition.

AB - We conducted X-ray diffraction study of YMn 2 O 5 single crystals with an orbital - radiation X-ray source to determine the lattice distortions related to the ferroelectric phase transition. At present, no anomaly of temperature dependence of lattice parameters has been detected around the ferroelectric transition point T CE = 39 K within the accuracy of lattice parameters, ± 1 × 104 Å. Moreover neither splitting of Bragg peaks nor appearance of a super lattice reflection were noticed below T CE . These facts indicate that ionic displacement at T CE is much smaller in YMn 2 O 5 than in typical ferroelectrics. On the basis of symmetry consideration, we discuss a possible ionic displacements at the ferroelectric transition.

KW - Lattice distortion

KW - Representation analysis

KW - RMn O

KW - Simultaneously ferroelectric and antiferromagnetic crystal

KW - Spontaneous polarization

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