scholarly journals A multiaxial electrical switching in a one-dimensional organic–inorganic (pyrrolidinium)2Cd2I6 ferroelectric and photoluminescent crystal

2021 ◽  
Author(s):  
Magdalena Rok ◽  
Bartosz Zarychta ◽  
Andrzej Bil ◽  
Joanna Trojan-Piegza ◽  
Wojciech Medycki ◽  
...  
Keyword(s):  
Ferroelectric Crystal ◽  
Electrical Switching ◽  
One Dimensional

A novel photoluminescent–ferroelectric crystal of (C4H10N)2[Cd2I6] (PCdI) has been obtained and characterized.

Simulation of Nonlinear Pyroelectric Response of Ferroelectrics near Phase Transition: Fractional Differential Approach

2020 ◽  
Vol 992 ◽  
pp. 843-848
Author(s):  
L. Moroz ◽  
Anna Maslovskaya
Keyword(s):  
Pyroelectric Coefficient ◽  
Ferroelectric Crystal ◽  
One Dimensional ◽  
Differential Approach ◽  
Thermal Distribution ◽  
Pyroelectric Current ◽  
Fractional Differential ◽  
Ferroelectric Single Crystal ◽  
Simulation Results ◽  
Pyroelectric Response

The paper is devoted to mathematical modeling pyroelectric current of ferroelectric single crystal under the conditions of intensive light heating in view of fractal behavior of these materials. The proposed approach is based on numerical simulation of thermal distribution in a ferroelectric sample using time fractional operator as well as computation of pyroelectric response. The simulation results for typical TGS ferroelectric crystal were described in one-dimensional case of the model in comparison with experimental data. Pyroelectric signals depending on temperature pyroelectric coefficient and thermal physical characteristics were also analyzed.

scholarly journals Temperature-Modulated Pyroelectricity Measurements of a Thin Ferroelectric Crystal With in-Plane Polarization and the Thermal Analysis Based on One-Dimensional Layer Models

2021 ◽  
Author(s):  
Kaoru Yamamoto ◽  
Ayumi Kawasaki ◽  
Takumi Chinen ◽  
and Kayo Ryugo
Keyword(s):  
Single Crystal ◽  
Standard Sample ◽  
Reference Sample ◽  
Transfer Model ◽  
Temperature Modulation ◽  
Ferroelectric Crystal ◽  
One Dimensional ◽  
Absorbing Layer ◽  
Lock In ◽  
Small Single Crystal

A temperature-modulated pyroelectricity measurement system for a small single crystal is developed and applied to standard sample measurements performed on a thin single crystal of lithium niobate. The modulation measurement is based on the AC technique, in which the temperature of the sample is periodically oscillated, and the synchronized pyroelectric signal is extracted using a lock-in amplifier. Temperature modulation is applied by irradiating periodic light on the sample placed in the heat exchange gas. To apply this technique to the transparent reference sample, a commercially available black resin is coated on the sample’s surface to absorb the light energy and transmits it to the specimen. The experimental results are analyzed using a two-layer heat transfer model to verify the effect of the light-absorbing layer as well as the non-contact temperature modulation system.

scholarly journals Temperature-Modulated Pyroelectricity Measurements of a Thin Ferroelectric Crystal with In-Plane Polarization and the Thermal Analysis Based on One-Dimensional Layer Models

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 880
Author(s):  
Kaoru Yamamoto ◽  
Ayumi Kawasaki ◽  
Takumi Chinen ◽  
Kayo Ryugo
Keyword(s):  
Single Crystal ◽  
Standard Sample ◽  
Reference Sample ◽  
Transfer Model ◽  
Temperature Modulation ◽  
Ferroelectric Crystal ◽  
One Dimensional ◽  
Absorbing Layer ◽  
Lock In ◽  
Small Single Crystal

A temperature-modulated pyroelectricity measurement system for a small single crystal is developed and applied to standard sample measurements performed on a thin single crystal of lithium niobate. The modulation measurement is based on the AC technique, in which the temperature of the sample is periodically oscillated, and the synchronized pyroelectric signal is extracted using a lock-in amplifier. Temperature modulation is applied by irradiating periodic light on the sample placed in the heat exchange gas. To apply this technique to the transparent reference sample, a commercially available black resin is coated on the sample’s surface to absorb the light energy and transmits it to the specimen. The experimental results are analyzed using a two-layer heat transfer model to verify the effect of the light-absorbing layer as well as the radiative temperature modulation system.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

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