Publication

Threshold Fields of Forming and Trapping a Vortex in a Small Htsc Particle

Alexander Tagantsev
1993
Journal Articles

Abstract

Within the thermodynamic Gibbs potential the theoretical consideration is given for possibility of forming a vortex line in superconducting particles of different shapes having the transverse size smaller than the penetration depth. The expressions are obtained for the threshold fields corresponding to forming and trapping a vortex during field cooling and zero-field cooling, demonstrating the dependence of these fields on particle radius. This agrees with the experiment performed in powder-like HTSC having different distributions over the particle sizes.

Official source

https://infoscience.epfl.ch/entities/publication/d25df6fd-90ab-4dd1-82cb-f2e8ef572693

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Alexander Tagantsev
1993
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d25df6fd-90ab-4dd1-82cb-f2e8ef572693

About this result

Related concepts (32)

Thermodynamic potential

A thermodynamic potential (or more accurately, a thermodynamic potential energy) is a scalar quantity used to represent the thermodynamic state of a system. Just as in mechanics, where potential energy is defined as capacity to do work, similarly different potentials have different meanings. The concept of thermodynamic potentials was introduced by Pierre Duhem in 1886. Josiah Willard Gibbs in his papers used the term fundamental functions. One main thermodynamic potential that has a physical interpretation is the internal energy U.

Chemical potential

In thermodynamics, the chemical potential of a species is the energy that can be absorbed or released due to a change of the particle number of the given species, e.g. in a chemical reaction or phase transition. The chemical potential of a species in a mixture is defined as the rate of change of free energy of a thermodynamic system with respect to the change in the number of atoms or molecules of the species that are added to the system.

Gibbs free energy

In thermodynamics, the Gibbs free energy (or Gibbs energy as the recommended name; symbol ) is a thermodynamic potential that can be used to calculate the maximum amount of work, other than pressure-volume work, that may be performed by a thermodynamically closed system at constant temperature and pressure. It also provides a necessary condition for processes such as chemical reactions that may occur under these conditions. The Gibbs free energy is expressed as where p is pressure, T is the temperature, U is the internal energy, V is volume, H is the enthalpy, and S is the entropy.

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