The relationship between magnetic order and ferroelectric properties has been investigated for MnWO4 with long-wavelength magnetic structure. Spontaneous electric polarization is observed in an elliptical spiral spin phase. The magnetic-field dependence of electric polarization indicates that the noncollinear spin configuration plays a key role for the appearance of ferroelectric phase. An elec...

Stress-induced changes in the imprint and switching behavior of ~111!-oriented Pb(Zr,Ti)O3 ~PZT!-based capacitors have been studied using piezoresponse force microscopy. Visualization of polarization distribution and d33-loop measurements in individual 131.5-mm 2 capacitors before and after stress application, generated by substrate bending, provided direct experimental evidence of stress-induc...

Coulomb explosion experiments using linearly polarized intense 60 fs laser pulses were conducted for structural characterization of three dichloroethylene (DCE) isomers, 1,1-DCE, cis-1,2-DCE, and trans-1,2-DCE. Under relatively low intensity at 1.8 × 1014 W/cm2, mass-resolved momentum imaging (MRMI) selected fragment ions 35Cl+ C2+ revealed different patterns the isomers. The ion fragmented fro...

Planar cell polarity signaling directs the polarization of cells within the plane of many epithelia. While these tissues exhibit asymmetric localization of a set of core module proteins, in Drosophila, more than one mechanism links the direction of core module polarization to the tissue axes. One signaling system establishes a polarity bias in the parallel, apical microtubules upon which vesicl...

The polarization of radar antenna vary with scan direction. This phenomenon is called Spatial Polarization Characteristic (SPC) of antenna. Based on the SPC of single polarized antenna, a novel polarization estimation method is established. Comparing with the traditional estimation method, this one has the following advantages: (i) It does not need dual-polarization channels to estimate the sig...

Abstract: Knots (emission features in jets of active galactic nuclei) often show non-ballistic dynamics and variable emission/polarization properties. We model these features as emission pattern propagating in a jet that carries a helical magnetic field and is launched along a changing direction. The model can reproduce a wide range of phenomena observed in the motion of knots: non-ballistic mo...

In spin-driven ferroelectrics, the electric polarization is often modified by the application of a magnetic field. RMnO3 (R = Tb, Dy) is a well known multiferroic with electric polarization along the c-axis induced by the cycloidal ordering of Mn spin moments in the bc plane, which can be explained by the inverse effect of Dzyaloshinski-Moriya interaction. RMnO3 exhibits an electric-polarizatio...

We proposed a model to study the resistance degradation behavior of ferroelectric oxides in the presence of ferroelectric spontaneous polarization by combining the phase-field model of ferroelectric domains and nonlinear diffusion equations for ionic/electronic transport. We took into account the nonperiodic boundary conditions for solving the electrochemical transport equations and Ginzburg–La...

In the presence of strong magnetic fields, the vacuum becomes a birefringent medium. We show that this QED effect couples the direction of the polarization of photons leaving the NS surface, to the direction of the magnetic field along the ray’s path. We analyze the consequences that this effect has on aligning the polarization vectors to generate large net polarizations, while considering ther...

The anisotropy of the electron velocity distribution function (EVDF) in plasmas can be deduced from the polarization of emissions induced by anisotropic electron-impact excitation. In this paper, we develop a compact thermal lithium atom beam source for spatially resolved measurements of the EVDF anisotropy in electron cyclotron resonance (ECR) plasmas. The beam system is designed such that the...