Browsing Electronic & Electrical Eng (Scholarly Publications) by Author "KALYMYKOV, YURI PETROVICH"
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Anisotropic rotational diffusion and transient nonlinear responses of rigid polar macromolecules in a strong external electric field
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (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
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (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 ... -
Bimodal approximation for anomalous diffusion in a potential
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (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 ... -
Classical quantum crossover in magnetic stochastic resonance in uniaxial superparamagnets
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (2010)It is shown that the signal-to-noise ratio of the magnetic moment fluctuations in the magnetic stochastic resonance of a quantum uniaxial paramagnet of arbitrary spin value S subjected to a weak probing ac field H(t) = ... -
Constant-magnetic-field effect in Neel relaxation of single-domain ferromagnetic particles
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (1995)The relaxation behavior of an assembly of noninteracting single-domain ferromagnetic particles in the presence of a constant magnetic field is studied by solving the corresponding Fokker-Planck equation. The analysis is ... -
Dynamic susceptibilities of an assembly of dipolar particles in an elastic environment
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (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 ... -
Effect of a uniform bias force on the Brownian movement in double-well potentials
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (American Physical Society, 1997)A general property of the Brownian motion in a bistable potential with the asymmetry arising from the imposition of a bias force is described. The property is that, at values of the bias force far less than the critical value ... -
Effect of an oblique magnetic field on the superparamagnetic relaxation time
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (American Physical Society, 1995)The effect of a constant magnetic field, applied at an angle to the easy axis of magnetization, on the Neel relaxation time of a single domain ferromagnetic particle (with uniaxial anisotropy) is studied by calculating the ... -
Effective-eigenvalue approach to the nonlinear Langevin equation for the Brownian motion in a tilted periodic potential. II. Application to the ring-laser gyroscope
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (American Physical Society, 1993)The effective-eigenvalue method is used to obtain an approximate solution for the mean beat-signal spectrum for the ring-laser gyroscope in the presence of quantum noise. The accuracy of the effective-eigenvalue method is ... -
Effective-eigenvalue approach to the nonlinear Langevin equation for the Brownian motion in a tilted periodic potential: Application to the Josephson tunneling junction
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (American Physical Society, 1993)The effective-eigenvalue method is used for a calculation of the impedance of the Josephson tunneling junction for an externally applied small-signal alternating current in the presence of noise. The accuracy of the method ... -
Exact analytic formula for the correlation time of a single-domain ferromagnetic particle
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (American Physical Society, 1994)Exact solutions for the longitudinal relaxation time T and the complex susceptibility ?(?) of a thermally agitated single-domain ferromagnetic particle are presented for the simple uniaxial potential of the crystalline ... -
Fractional rotational diffusion of rigid dipoles in an asymmetrical double-well potential
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH; VIJ, JAGDISH KUMAR (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 ... -
Fractional translational diffusion of a Brownian particle in a double well potential
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (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 ... -
Inertial Effects in the Fractional Translational Brownian Motion in a Double-Well Potential
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (2007)The anomalous translational diffusion including inertial effects of nonlinear Brownian oscillators in a double well potential V(x)=ax2?2+bx4?4 is considered. An exact solution of the fractional Klein-Kramers (Fokker-Planck) ... -
Inertial effects in the nonlinear transient relaxation of rigid rodlike molecules in a strong dc electric field
COFFEY, WILLIAM THOMAS; KALYMYKOV, YURI PETROVICH (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 ...