Crystal-field interactions in PrRu2Si2

CRYSTAL-FIELD EFFECTS AND MAGNETIC INTERACTIONS IN AMORPHOUS Ce89Al11

Dispersive crystal field excitations and quadrupolar interactions in UPd3.

We report inelastic neutron scattering measurements and random phase approximation calculations of the dispersive crystal field excitations of UPd(3). The measured spectra at lower energies agree with those calculated using quadrupolar interaction parameters deduced from bulk and x-ray scattering measurements. The more intense excitations arising from the hexagonal sites were used to obtain exc...

Theory of crystal-field interactions in solid hydrogen. I. Single ortho impurities in solid parahydrogent

The theory of the crystal-field splitting, V,, of the J = I level of an ortho impurity in a parahydl-ogen matrix, due to the coupling of the rotational motion of the ortho molecule to the lattice vibrations, is developed taking due account of the quantum-crystal nature of the solid. Two contl-ibutions to V, are identified, both arising from the anisotropy in the lattice vibrations. One contribu...

Static magnetic susceptibility, crystal field and exchange interactions in rare earth titanate pyrochlores.

The experimental temperature dependence (T = 2-300 K) of single crystal bulk and site susceptibilities of rare earth titanate pyrochlores R(2)Ti(2)O(7) (R = Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) is analyzed in the framework of crystal field theory and a mean field approximation. Analytical expressions for the site and bulk susceptibilities of the pyrochlore lattice are derived taking into account lon...

Hydrodynamic interactions in active colloidal crystal microrheology.

In dense colloids it is commonly assumed that hydrodynamic interactions do not play a role. However, a found theoretical quantification is often missing. We present computer simulations that are motivated by experiments where a large colloidal particle is dragged through a colloidal crystal. To qualify the influence of long-ranged hydrodynamics, we model the setup by conventional Langevin dynam...