Superconductivity of gallium in confined geometries

• Published in: Solid state communications Vol. 94; no. 8; pp. 635 - 641
• Main Authors: Charnaya, E.V., Kumzerov, Yu.A., Tien, C., Wur, C.S.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.05.1995; Elsevier
• Subjects: A. nanostructures; B. phase transitions; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Metals, alloys and compounds (a15, 001c15, laves phases, chevrel phases, borocarbides, etc.); Metals; alloys and binary compounds (including A15, Laves phases, etc.); Physics; Superconducting materials (excluding high-tc compounds); Superconductivity; superconductors; superconductors; B. phase transitions; A. nanostructures; Gallium; Transition temperature; Magnetometers; Superconductivity; Magnetic-phase diagrams; Nanostructures; Experimental study; Phase transitions; SQUID devices; Composite materials; Hysteresis; Superconducting transition; Magnetic properties
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/0038-1098(95)00120-4

Superconductivity of gallium embedded in the porous glass with average pore size of 4 nm was studied for the first time using a SQUID magnetometer. A sharp superconducting phase transition was found at 6.4 K. Hysteretic behavior at high and low magnetic fields was observed. The phase diagram in the H-T plane was obtained. The first order phase transition in the vortex system was observed. A qualitative model of the superconducting properties of the porous glass with gallium has been developed.