Open AccessДинамическая восприимчивость нанокомпозита пористое стекло/Ga-In-Sn в области сверхпроводимости
Author(s) -
О.Д. Шевцова,
М.В. Лихолетова,
Е.В. Чарная,
Е.В. Шевченко,
Ю.А. Кумзеров,
А.В. Фокин
Publication year - 2022
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2022.01.51829.195
Subject(s) - condensed matter physics , superconductivity , materials science , vortex , gallium , curvature , phase (matter) , nanocomposite , maxima , nanotechnology , thermodynamics , physics , metallurgy , geometry , quantum mechanics , art , mathematics , performance art , art history
Interest to studies of gallium alloys increased recently in relation to their prospective applications for self-healing superconducting connections and wires. Special attention is focused on superconductive properties of nanostructured alloys. In the present work we studied the ac susceptibility of a porous glass/Ga-In-Sn nanocomposite within the temperature range from 1.9 to 8 K at bias fields up to 5 T. Two superconducting phase transitions were revealed with temperatures of 5.6 and 3.1 K. Phase diagrams were created. Positive curvature of the parts of critical lines was demonstrated and treated within the framework of a proximity effect model. Vortex activation barriers were found from shifts of the maxima of the imaginary parts of susceptibility with changing the ac frequency. A bend was shown on the field dependence of the activation barriers.