Ferroelectric and dielectric anisotropy in high-quality SrBi 2Ta2O9 single crystals

H. Amorín; V. V. Shvartsman; A. L. Kholkin; M. E.V. Costa

doi:10.1063/1.1836017

Ferroelectric and dielectric anisotropy in high-quality SrBi ₂Ta₂O₉ single crystals

H. Amorín^*
, V. V. Shvartsman
, A. L. Kholkin
, M. E.V. Costa

^*Šī darba korespondējošais autors

University of Aveiro

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

48 Atsauces (Scopus)

Kopsavilkums

High-quality SrBi₂Ta₂O₉ single crystals were obtained by a self-flux solution method. The crystals were naturally oriented with [001] direction perpendicular to the major face and edges parallel to [110] axes. The dielectric and ferroelectric properties of the crystals were investigated along the c axis and in the ab plane of the orthorhombic unit cell. The ferro-paraelectric phase transition was observed at T_C=355°C. The anisotropy of dielectric permittivity, i.e., the ratio between average permittivity in the ab plane and along c axis was about 10 at T_C and decreased to ∼2 at room temperature. Saturated hysteresis loops were observed for switching in the ab plane. The spontaneous polarization along ferroelectric a axis was estimated to be ≈ 20 μ.C/cm².

Oriģinālvaloda	Angļu
Lapas (no-līdz)	5667-5669
Lapu skaits	3
Žurnāls	Applied Physics Letters
Sējums	85
Izdevuma numurs	23
DOIs	https://doi.org/10.1063/1.1836017
Publikācijas statuss	Publicēts - 6 dec. 2004
Ārēji publicēts	Jā

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abstract = "High-quality SrBi2Ta2O9 single crystals were obtained by a self-flux solution method. The crystals were naturally oriented with [001] direction perpendicular to the major face and edges parallel to [110] axes. The dielectric and ferroelectric properties of the crystals were investigated along the c axis and in the ab plane of the orthorhombic unit cell. The ferro-paraelectric phase transition was observed at TC=355°C. The anisotropy of dielectric permittivity, i.e., the ratio between average permittivity in the ab plane and along c axis was about 10 at TC and decreased to ∼2 at room temperature. Saturated hysteresis loops were observed for switching in the ab plane. The spontaneous polarization along ferroelectric a axis was estimated to be ≈ 20 μ.C/cm2.",

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AU - Costa, M. E.V.

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AB - High-quality SrBi2Ta2O9 single crystals were obtained by a self-flux solution method. The crystals were naturally oriented with [001] direction perpendicular to the major face and edges parallel to [110] axes. The dielectric and ferroelectric properties of the crystals were investigated along the c axis and in the ab plane of the orthorhombic unit cell. The ferro-paraelectric phase transition was observed at TC=355°C. The anisotropy of dielectric permittivity, i.e., the ratio between average permittivity in the ab plane and along c axis was about 10 at TC and decreased to ∼2 at room temperature. Saturated hysteresis loops were observed for switching in the ab plane. The spontaneous polarization along ferroelectric a axis was estimated to be ≈ 20 μ.C/cm2.

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