Irreversibility in Rolled Tantalum

Irreversibility in Rolled Tantalum

Publication Type:

Journal Article

Source:

Journal of Superconductivity and Novel Magnetism, Volume 31, Issue 7, p.2047-2054 (2018)

ISBN:

1557-1939

Abstract:

<p>We investigated the magnetic and thermodynamic properties of rolled tantalum in superconducting state. The magnetization shows a crossover from type I to type II superconductivity as the magnetic field increases beyond the thermodynamic critical field. In both regimes, the sample shows a substantial irreversibility of the magnetization which we attribute to the pinning of the entities that characterize the intermediate and mixed states. Magnetic relaxation data taken in the intermediate state shows an important contribution of the quantum tunnelling below 3.7 K.</p>