Electronic & Electrical Eng: Recent submissions
Now showing items 601-620 of 750
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Reversal time of the magnetization of single-domain ferromagnetic particles with mixed uniaxial and cubic anisotropy
(American Physical Society, 2009)The reversal time of the magnetization of single-domain ferromagnetic particles is estimated for mixed uniaxial and cubic anisotropy energies possessing nonparaboloidal saddles and well bottoms or either. The calculation ... -
Nonlinear noninertial response of a quantum Brownian particle in a tilted periodic potential to a strong ac force as applied to a point Josephson junction
(American Physical Society, 2009)The quantum Smoluchowski equation for the reduced Wigner function in configuration space pertaining to the quantum Brownian motion of a particle in a tilted cosine potential in the high dissipation (or noninertial) limit ... -
Fractional translational diffusion of a Brownian particle in a double well potential
(American Institute of Physics, 2006)The fractional translational diffusion of a particle in a double-well potential (excluding inertial effects) is considered. The position correlation function and its spectrum are evaluated using a fractional probability ... -
Anisotropic rotational diffusion and transient nonlinear responses of rigid polar macromolecules in a strong external electric field
(American Institute of Physics, 2007)Nonlinear transient responses of polar polarizable particles (macromolecules) diluted in a nonpolar solvent to a sudden change in magnitude of a strong external dc field are evaluated using the anisotropic noninertial ... -
Anomalous nonlinear dielectric and Kerr effect relaxation steady state responses in superimposed ac and dc electric fields
(American Institute of Physics, 2007)It is shown how the rotational diffusion model of polar molecules (which may be described in microscopic fashion as the diffusion limit of a discrete time random walk on the surface of the unit sphere) may be extended to ... -
Solution of the master equation for Wigner's quasiprobability distribution in phase space for the Brownian motion of a particle in a double well potential
(American Institute of Physics, 2007)Quantum effects in the Brownian motion of a particle in the symmetric double well potential V(x)=ax2/2+bx4/4 are treated using the semiclassical master equation for the time evolution of the Wigner distribution function ... -
Phase-space formulation of the nonlinear longitudinal relaxation of the magnetization in quantum spin systems
(American Physical Society, 2007)Nonlinear longitudinal relaxation of a spin in a uniform external dc magnetic field is treated using a master equation for the quasiprobability distribution function of spin orientations in the configuration space of polar ... -
High-frequency dielectric behavior of a ferroelectric liquid crystal near the smectic-C*-smectic-A phase transition
(American Physical Society, 1992)The temperature and frequency dependence of the complex dielectric susceptibility of a ferroelectric liquid crystal (FLC) near the smectic-C*-smectic-A phase transition has been calculated using the generalized Landau ... -
Mechanical load cell based on cavity-controlled microwave oscillators
(IEEE, 1991)A device consisting of a rectangular resonator to which two oscillators are coupled at right angles to each other is described. The frequency of each oscillator is controlled by the cavity, and distortions caused by ... -
Computer-controlled submillimeter Fourier spectrometer
(IEEE, 1989)A system for a submillimeter wave Fourier transform spectroscopy (FTS) has been automated for the measurement of the power absorption coefficient of liquids in the wavenumber range 10- 400 cm-?. The interferometer is ... -
Some New FIR Laser Lines of Optically Pumped 12CD2C12; Absorption Spectroscopy 12 CH3160H, 12CH3160D, and 12CH31, 12CH3Br, of Water and Acetonitrile
(IEEE, 1986)No abstract available. -
Fractional rotational diffusion of rigid dipoles in an asymmetric double-well potential
(American Physical Society, 2005)The longitudinal and transverse components of the complex dielectric susceptibility tensor of an assembly of dipolar molecules rotating in an asymmetric double-well potential are evaluated using a fractional rotational ... -
Propagation of an electromagnetic wave in an absorbing anisotropic medium and infrared transmission spectroscopy of liquid crystals
(2005)The theory of absorbance is developed for the entire electromagnetic spectrum of radiation in a semi-infinite anisotropic medium with a second rank dielectric tensor, the elements of which are complex and frequency dependent. ... -
Experimental study for the conditions of analog switching in ferroelectric liquid crystal cells
(American Institute of Physics, 2007)The authors study the effect of the spontaneous polarization (PS) of a ferroelectric liquid crystal mixture with compensated helix and of the thickness of the alignment layer (da) on the analog switching in a cell. The ... -
Dielectric relaxation and crystallization of nanophase separated 1-propanol-isoamylbromide mixture
(2007)The effects of liquid-liquid phase separation on molecular relaxation of an apparently homogeneous mixture of 1-propanol and isoamylbromide has been studied by dielectric spectroscopy over a broad frequency and temperature ... -
Solitary wave propagation in surface stabilized ferroelectric liquid crystal cells
(2008)Solitary wave propagation in surface stabilized ferroelectric liquid crystal cells controlled by surface anchoring of the alignment layers is investigated for different conditions of alignment on the two opposite surfaces. ... -
Experimental study of high-temperature smectic- C FI2 phase in chiral smectic liquid crystals that exhibit phase-sequence reversal
(2008)We report the results of an experimental study of a recently observed phase sequence reversal of smectic-C<sub>FI2</sub><sup>*</sup> [SmC*(qT=1/2); a four layer antiferroelectric] phase appearing in the temperature range ... -
Effect of cell surfaces on the stability of chiral smectic- C phases
(2008)The effect of surfaces on the stability of smectic-C* (SmC*) variant phases is investigated. The results obtained using dielectric spectroscopy by varying the cell thickness show that the temperature ranges of SmC<sub>al ... -
Dynamic mechanism of the ferroelectric to antiferroelectric phase transition in chiral smectic liquid crystals
(2008)We report on the observation of V-shaped switching in a ferroelectric liquid crystal cell over a wide range of temperatures. Results of the optical transmittance in the visible region give us the helical pitch for various ... -
V-shaped electro-optic response observed in a chiral ferroelectric smectic liquid crystal
(2008)We report on the observation of V-shaped switching in a ferroelectric liquid crystal cell over a wide range of temperatures. Results of the optical transmittance in the visible region give us the helical pitch for various ...
