The dependence of the polarization and of the dielectric constant of KH2 AsO4 on temperature and electric field is investigated in the paraelectric and the ferroelectric phases.Their behaviour is characteristic of a first-order transition. The phenomenological theory of ferroelectricity accounts for the...
Temperature dependences of the spontaneous polarization and the dielectric constant are calculated near the paraelectric-ferroelectric (cubic-tetragonal) transition in BaTiO3 using our mean field model. By expanding the free energy in terms of the spontaneous polarization (order parameter), expressions...
Influences of dispersion, dielectric constant and polarization on the double-parameter asymmetric Gaussian potential quantum dot qubit Selecting the double-parameter asymmetric Gaussian (AG) potential to describe the confinement effects of electrons in quantum dot (QD), the effect of diele... XF Bai,...
A highly polarizable high dielectric constant positioning and motion control of the elements (approximately planar mirrors) of a Fresnel reflector solar concentrator tracking heliostat array wherein the elements are suspended with the center of mass above the swivel point, below the swivel point, or ...
This dielectric substrate material with thickness, C = 0.25 mm as illustrated in Fig. 1b was selected in this research study. In the selection process of substrate material, the tangent loss (δ) and dielectric constant (ε) of the RO3006 material were taken into the consideration. This...
(c) The Cp and M within T52–11 K. (d) Measured Ipyro as a function of T under different warming rate (2 and 4 K/min). (e) T dependence of polarization (P) and dielectric constant (e) at three different frequencies as labeled. stabilization of the non-collinear spin configuration...
The study provides a stimulating example that triboelectric nano generator/piezoresistive sensor is made from chitosan and used in the multi-modal sensing system. 展开 关键词: biodegradable triboelectric nanogenerators enhanced dielectric constant ionic and interfacial polarization multi-modal sensing systems ...
An extension of the Onsager theory of dielectric polarization is presented. The local dielectric constant is approximated by the macroscopic dielectric constant of the fluid in a region outside a molecule and its first shell of neighbors rather than in the entire region exterior to the molecule. ...
εij and \({\varepsilon }_{ij}^{0}\) are the total local strain and eigenstrain, respectively, Ei is the electric field component, ε0 is the vacuum permittivity, and κij is the background dielectric constant. The Landau energy density fLand is expressed as: $${f}_{{{\rm{Land}...
where an external voltageVdcwas applied to the tip, and the substrate was grounded. The tip radius was set to 25 nm. A Dirichlet boundary condition was imposed, assuming that the air potential infinitely far away from the tip was zero. The relative dielectric constants of CIPS and air wer...