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The statistical-thermodynamic formalism of a collection of localized spin-1/2 atoms whose spin Hamiltonian refers to the isotropic antiferromagnetic Heisenberg exchange-interaction scheme is applied here to account for a set of important equilibrium-thermodynamic measurements on paramagnetic...
In the current-induced resistive state, multiquantum flux tubes are nucleated at the edge of thin-film strips of type I superconductors. The nucleation process can be theoretically described by an extended Gibbs free-energy barrier model. Within this model the size of the nucleated flux tubes is...
It is shown that the minimum temperature hysteresis of 30 mK, observed for the hcp-fcc4He transition near the triple point with the fluid, is a consequence of the adiabatic character of this transition.
The processes of heating and cooling of a metal film evaporated on a dielectric substrate are analyzed. The phonon propagation in the substrate is assumed to be diffusive due to static defect scattering.
The Shiba model for the paramagnetic impurities in a superconductor has been generalized to include the effect of gap anisotropy. The calculated properties are the transition temperatureT
c and the specific heat jump atT
c. The changes brought in these properties by anisotropy are significant.
In a previous paper we predicted a linear splitting of collective modes in3He-B with magnetic field, in particular, a fivefold splitting of the (8/5)1/2 Δ mode. A fivefold splitting of about the same size has been recently observed by Avenel, Varoquaux, and Ebisawa for the new sound attenuation...
The effect of quantum tunneling of the phase variable in SQUIDs is studied as a source of zero-temperature noise in the system. It is concluded that quantum tunneling plays no role in the ultimate uncertainty principle limitation of SQUID resolution. A simple expression is derived for the latter...
The properties of195Pt nuclear magnetic resonance of small particles have been studied over a range of particle sizes from 33 to 200 Å using pulsed NMR techniques. This work was initiated to study size-dependent phenomena and to elucidate their physical origin. An anomalous linewidth, more than...
Equations for low-temperature adsorption isotherms, isosteric heats of adsorption, and heat capacities of the adsorbed phase are developed for monolayer localized adsorption of monoatomic gases on heterogeneous solid surfaces. The model assumes that adsorption sites having various adsorption...
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