TU Darmstadt / ULB / TUbiblio

Orientation-Dependence of Thermal Depolarization and Phase Development in Bi1/2 Na1/2 TiO3-BaTiO3 Single Crystals

Schneider, Deborah ; Rödel, Jürgen ; Rytz, Daniel ; Granzow, Torsten (2015)
Orientation-Dependence of Thermal Depolarization and Phase Development in Bi1/2 Na1/2 TiO3-BaTiO3 Single Crystals.
In: Journal of the American Ceramic Society, 98 (12)
doi: 10.1111/jace.13843
Article, Bibliographie

Abstract

The direction-dependence of pyroelectric properties of (1 – x) Bi1/2 Na1/2 TiO3 – xBaTiO3 (BNT – 100xBT) is investigated, using single crystal samples with well-defined orientations for x = 0.036 and x = 0.063. The results are compared with those of temperature-dependent measurements of the ferroelectric and dielectric hysteresis. The depolarization temperature Td of each crystal composition is found to depend on crystal orientation, a fact that is explained by differences in the stability of respective domain configurations. A rationalization is offered for the observation that Td differs from the ferroelectric-relaxor transition temperature, depending on orientation. The hysteresis curves of BNT – 3.6BT are typical for a rhombohedral system with a ferroelectric-relaxor transition, with polarization reversal close to Td occurring in a multistep process that includes decay of ferroelectric domains into polar nanoregions and re-formation of domains. BNT – 6.3BT, a composition in the region of the morphotropic phase boundary, shows the same feature, but additionally is characterized by a field-induced transition between rhombohedral and tetragonal symmetry. This combination results in an effective piezoelectric coefficient of d*33=1886 pm/V.

Item Type: Article
Erschienen: 2015
Creators: Schneider, Deborah ; Rödel, Jürgen ; Rytz, Daniel ; Granzow, Torsten
Type of entry: Bibliographie
Title: Orientation-Dependence of Thermal Depolarization and Phase Development in Bi1/2 Na1/2 TiO3-BaTiO3 Single Crystals
Language: English
Date: 10 November 2015
Journal or Publication Title: Journal of the American Ceramic Society
Volume of the journal: 98
Issue Number: 12
DOI: 10.1111/jace.13843
Abstract:

The direction-dependence of pyroelectric properties of (1 – x) Bi1/2 Na1/2 TiO3 – xBaTiO3 (BNT – 100xBT) is investigated, using single crystal samples with well-defined orientations for x = 0.036 and x = 0.063. The results are compared with those of temperature-dependent measurements of the ferroelectric and dielectric hysteresis. The depolarization temperature Td of each crystal composition is found to depend on crystal orientation, a fact that is explained by differences in the stability of respective domain configurations. A rationalization is offered for the observation that Td differs from the ferroelectric-relaxor transition temperature, depending on orientation. The hysteresis curves of BNT – 3.6BT are typical for a rhombohedral system with a ferroelectric-relaxor transition, with polarization reversal close to Td occurring in a multistep process that includes decay of ferroelectric domains into polar nanoregions and re-formation of domains. BNT – 6.3BT, a composition in the region of the morphotropic phase boundary, shows the same feature, but additionally is characterized by a field-induced transition between rhombohedral and tetragonal symmetry. This combination results in an effective piezoelectric coefficient of d*33=1886 pm/V.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 12 Nov 2015 13:08
Last Modified: 16 Oct 2020 07:41
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details