ar X iv : c on d - m at / 9 70 52 39 v 3 1 J un 1 99 8 Sonoluminescence : Coupling to an Applied Magnetic Field

ar X iv : c on d - m at / 9 70 52 39 v 1 2 3 M ay 1 99 7 Sonoluminescence : Coupling to an Applied Magnetic Field

We investigate several means of coupling between a sonoluminescing bubble and an applied magnetic field. Recent experiments show a strong quadratic dependence between the forcing pressures required for stable sonolumines-cence and magnetic field amplitude. However, all coupling mechanisms calculated here are at most one percent perturbations. The most likely explanation is a sensitive hydrodyna...

ar X iv : c on d - m at / 9 80 60 22 v 1 2 J un 1 99 8 Lattice Dimerization in the Spin - Peierls Compound CuGeO 3

The uniaxial pressure dependences of the exchange coupling and the structural distortion in the dimerized phase of CuGeO3 are analyzed. A minimum magnetic dimerization of 3 % is obtained, incompatible with an adiabatic approach to the spin–Peierls transition. Exploring the properties of an Heisenberg spin chain with dynamical spin-phonon coupling, the dimerization dependence of the spin excitat...

ar X iv : c on d - m at / 9 80 60 82 v 1 [ co nd - m at . m tr l - sc i ] 5 J un 1 99 8 Magnetic Particles

ar X iv : c on d - m at / 9 80 60 43 v 1 3 J un 1 99 8 Electrodymanics with Toroid Polarization

A modified system of equations of electrodynamics has been obtained. Beside the Lagrangian one an alternative gauge-like formalism has been developed to introduce the toroid moment contributions in the equations obtained. The two potential formalism that was worked out by us earlier has been developed further where along with the two vector potentials we introduce two scalar potentials thus tak...

ar X iv : c on d - m at / 9 30 70 65 v 1 2 9 Ju l 1 99 3 Chaos in short - range spin glasses

The nature of static chaos in spin glasses is studied. For the problem of chaos with magnetic field, scaling relations in the case of the SK model and short-range models are presented. Our results also suggest that if there is de Almeida-Thouless line then it is similar to that of mean-field theory for d = 4 and close to the h = 0 axis for d = 3. We estimate the lower critical dimension to be i...