Electronic & Electrical Eng (Scholarly Publications): Recent submissions
Now showing items 441-460 of 610
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Dynamic susceptibilities of an assembly of dipolar particles in an elastic environment
(American Physical Society, 2001)Theoretical model to describe magnetodynamics of a ferrogel, i.e., an assembly of ferromagnetic nanoparticles embedded in a gel, is proposed. The reorientations of the particles are determined by the influence of the elastic ... -
Precessional effects in the linear dynamic susceptibility of uniaxial superparamagnets: Dependence of the ac response on the dissipation parameter
(American Physical Society, 2001)It is shown that the low-frequency relaxation spectrum of the linear dynamic susceptibility of uniaxial single domain particles with a uniform magnetic field applied at an oblique angle to the easy axis can be used ... -
Interpolation formula between very low and intermediate-to-high damping Kramers escape rates for single-domain ferromagnetic particles
(American Physical Society, 2001)It is shown that the Mel?nikov-Meshkov formalism for bridging the very low damping (VLD) and intermediate-to-high damping (IHD) Kramers escape rates as a function of the dissipation parameter for mechanical particles may ... -
Inertial effects in anomalous dielectric relaxation
(American Physical Society, 2002)The inertia corrected Debye model of rotational Brownian motion of polar molecules is generalized to fractional dynamics (anomalous diffusion) in the context of the fractional Klein-Kramers equation. The fractal generalization ... -
Inertial effects in the anomalous dielectric relaxation of rotators in space
(American Physical Society, 2002)The linear dielectric response of an assembly of noninteracting linear (needlelike) dipole molecules (each of which is free to rotate in space) is evaluated in the context of fractional dynamics. The infinite hierarchy of ... -
Anomalous dielectric relaxation in an N-fold cosine potential
(American Physical Society, 2003)The fractional Klein-Kramers (Fokker-Planck) equation describing the fractal time dynamics of an assembly of fixed axis dipoles rotating in an N-fold cosine potential representing the internal field due to neighboring ... -
Bimodal approximation for anomalous diffusion in a potential
(American Physical Society, 2004)Exact and approximate solutions of the fractional diffusion equation for an assembly of fixed-axis dipoles are derived for anomalous noninertial rotational diffusion in a double-well potential. It is shown that knowledge ... -
Inertial effects in anomalous dielectric relaxation of symmetrical top molecules
(American Physical Society, 2004)The linear dielectric response of an assembly of noninteracting symmetrical top molecules (each of which is free to rotate in space) is evaluated in the context of fractional dynamics. The infinite hierarchy of ... -
Thermally activated escape rate for the Brownian motion of a fixed axis rotator in a double well potential for all values of the dissipation
(American Institute of Physics, 2004)The rotational Brownian motion of fixed axis rotators in a double well cosine potential was analyzed using the extension of the Kramers theory of the escape rate of a Brownian particle from a potential well to the entire ... -
Microscopic models for dielectric relaxation in disordered systems
(American Physical Society, 2004)It is shown how the Debye rotational diffusion model of dielectric relaxation of polar molecules (which may be described in microscopic fashion as the diffusion limit of a discrete time random walk on the surface of ... -
Precession aided magnetic stochastic resonance in ferromagnetic nanoparticles with cubic anisotropy
(American Physical Society, 2005)It is shown that the signal-to-noise ratio in the magnetic stochastic resonance of single-domain ferromagnetic nanoparticles having cubic anisotropy exhibits a strong intrinsic dependence on the decay rate a of the ... -
Nonlinear response of permanent dipoles in a uniaxial potential to alternating fields
(American Physical Society, 2005)It is shown how the existing theory of the dynamic Kerr effect and nonlinear dielectric relaxation based on the noninertial Brownian rotation of noninteracting rigid dipolar particles may be generalized to take into account ... -
Fractional rotational diffusion of rigid dipoles in an asymmetrical 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 ... -
Thermally activated escape rate for the Brownian motion of a fixed axis rotator in an asymmetrical double-well potential for all values of the dissipation
(American Institute of Physics, 2005)The Kramers theory of the escape rate of a Brownian particle from a potential well as extended by Mel'nikov and Meshkov, [J. Chem. Phys. 85, 1018 (1986)] is used to evaluate the relaxation times and the dynamic susceptibility ... -
Magnetization dynamics of two interacting spins in an external magnetic field
(American Physical Society, 2005)The longitudinal relaxation time of the magnetization of a system of two exchange coupled spins subjected to a strong magnetic field is calculated exactly by averaging the stochastic Gilbert-Landau-Lifshitz equation for ... -
Thermally activated escape rate for a Brownian particle in a double-well potential for all values of the dissipation
(American Institute of Physics, 2006)The translational Brownian motion of a particle in a tilted washboard potential is considered. The dynamic structure factor and longest relaxation time are evaluated from the solution of the governing Langevin equation by ... -
Phase-space equilibrium distributions and their applications to spin systems with nonaxially symmetric Hamiltonians
(American Institute of Physics, 2008)The Fourier series representation of the equilibrium quasiprobability density function WS(theta,phi) or Wigner function of spin ?orientations? for arbitrary spin Hamiltonians in a representation (phase) space of the polar ... -
Smoluchowski equation approach for quantum Brownian motion in a tilted periodic potential
(American Institute of Physics, 2008)Quantum corrections to the noninertial Brownian motion of a particle in a one-dimensional tilted cosine periodic potential are treated in the high-temperature and weak bath-particle coupling limit by solving a quantum ... -
Inertial effects in the orientational relaxation of rodlike molecules in a uniaxial potential
(American Physical Society, 2009)The inertial rotational Brownian motion and dielectric relaxation of an assembly of noninteracting rodlike polar molecules in a uniaxial potential are studied. The infinite hierarchy of differential-recurrence relations ... -
Inertial effects in the nonlinear transient relaxation of rigid rodlike molecules in a strong dc electric field
(American Institute of Physics, 2008)A method of calculation of nonlinear transient responses of an assembly of noninteracting polar linear molecules due to sudden changes in a strong external dc electric field is presented. The infinite hierarchy of ...
