We present the data of the point contact (PC) Andreev-reflection
measurements on the new paramagnetic superconductor
Mo3Sb7, which were used for finding the energy gap
Δ and upper
critical field Hc 2
for this compound. The maximum gap value, reduced to the zero temperature via the
Bardeen–Cooper–Schrieffer (BCS) theory, turned out to be meV, which is slightly smaller than that expected from the BCS theory, meV. The temperature dependence of the gap obeys the BCS theory approximately. The
Hc 2(0)
value of about 16.5 kOe was obtained from fitting the experimental data to the conventional
H(T)
dependence, which is quadratic in temperature. This value is in close agreement with the
result from magnetization measurements of 17.2 kOe.
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