1,641 research outputs found
Bulk superconductivity in Bi4O4S3 revealed by specific heat measurement
Specific heat experiments on a well-characterized polycrystalline sample of
the BiS2 based superconductor Bi4O4S3 revealed that it shows a crear specific
heat anomaly at about Tc = 4.4 K, consistent with Tc from the resistivity and
dc susceptibility. This observation indicates the superconductivity of Bi4O4S3
to be bulk in nature
Superconductivity in S-substituted FeTe
We have successfully synthesized a new superconducting phase of FeTe1-xSx
with a PbO-type structure. It has the simplest crystal structure in iron-based
superconductors. Superconducting transition temperature is about 10 K at x =
0.2. The upper critical field Hc2 was estimated to be ~70 T. The coherent
length was calculated to be ~2.2 nm. Because FeTe1-xSx is composed of nontoxic
elements, this material is a candidate for applications and will activate more
and more research on iron-based superconductor.Comment: 13 pages, 10 figure
Pressure study of the new iron-based superconductor K0.8Fe2Se2
We investigated pressure effects on transition temperature (Tc) of the new
iron-based superconductor K0.8Fe2Se2 using a BeCu/NiCrAl hybrid-type clamped
piston-cylinder cell. The Tc(onset) was 33K at 0.85 GPa. With increasing
pressure, Tc(onset) gradually increased and reached 36.6 K at 2.03 GPa.Comment: 8 pages, 3 figure
Alcoholic beverages induce superconductivity in FeTeS
We found that hot alcoholic beverages were effective in inducing
superconductivity in FeTeS0. Heating FeTeS0
compound in various alcoholic beverages enhances the superconducting properties
compared to pure water-ethanol mixture as a control. Heating with red wine for
24 hours leads to the largest shielding volume fraction of 62.4% and the
highest zero resistivity temperature of 7.8 K. Some components present in
alcoholic beverages, other than water and ethanol, have the ability to induce
superconductivity in FeTeS0 compound.Comment: 12 pages, 4 figures, accepted for publication in Supercond. Sci.
Techno
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