Magnetic-field-induced superconductivity

The electrical resistance, $R$, of the pressure-induced superconductors ${\mathrm{Sn}}_{x}{\mathrm{Eu}}_{1.2\ensuremath{-}x}{\mathrm{Mo}}_{6}{\mathrm{S}}_{8}$ with $x=0.0 \mathrm{and} 0.12$ has been investigated as a function of magnetic field up to 17 T and at pressures up to 18 kbar. At the pressure where ${T}_{c}$ is a maximum, 14 kbar, a minimum is observed in the resistance versus field at temperatures below 4.2 K and for fields between 10 and 15 T. In particular, for the sample with $x=0$, $R$ approaches 0 in this high-field region. At other pressures and for the other sample the anomaly is not as pronounced.