New Superconductors

Superconductivity and Phase Diagram in the Nanostructured Eutectic Ga-Ag Alloy

“…The second segregated phase in the bulk gallium-rich Ga−Ag alloy was recently identified as the Ag 3 Ga 2 intermetallic compound [35]. However, according to the results obtained in [33], the bulk Ga−Ag alloy did not show superconducting transitions down to 1.6 K for gallium composition larger than 70 at.%. Therefore, the Ag 3 Ga 2 compound, which occurs in the solid alloy when gallium composition is higher than 40 at%, cannot respond for superconductivity below 2.65 K in our sample.…”

“…Superconductivity in bulk Ga−Ag alloys was studied in [33,34]. The superconducting transitions within the interval 6.5 to 8 K were observed for alloys with intermediate amount of gallium from 20 up to 70 at.% [33].…”

“…Superconductivity in bulk Ga−Ag alloys was studied in [33,34]. The superconducting transitions within the interval 6.5 to 8 K were observed for alloys with intermediate amount of gallium from 20 up to 70 at.% [33]. The high critical temperatures corresponded to the segregation of gallium−silver intermetallic compounds.…”

Relaxation time for magnetoresistance obtained from the band structure of a perfect cubic metal

“…On the other hand, for a single crystal of Sn the saturation is observed with the current directed along the c axis and a special orientation of the B ជ field in the basal plane. 5,26 As a consequence, a typical problem concerning magnetoresistance became its rapid change with direction of the magnetic field when this field is tilted to the crystallographic axes. 4,6 In high fields the observed magnetoresistance tends to saturate except in those directions in which open orbits exist.…”