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Now showing items 1-10 of 31

#### 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 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 ...

#### 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 ...

#### 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 ...

#### 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 ...

#### 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 relaxation time of a single domain ferromagnetic particle subjected to a uniform field at an oblique angle to the easy axis: Comparison with experimental observations

(American Physical Society, 1998)

New asymptotes of the relaxation time of the magnetic moment of a single domain particle with a uniform magnetic field applied at an oblique angle to the easy axis (in excellent agreement with exact numerical results from ...

#### 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 ...

#### 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 ...

#### 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 ...