range of the superconducting transition with and without an
applied magnetic field. With increasing the applied fields no more
than 0.3 T, zero resistivity decreases gradually. With even higher
magnetic fields up to 14 T, the zero resistivity state is not reached,
and only the onset of superconducting transition is observed. As
sketched in Fig. 4, the increase of resistivity with applying magnetic
fields is small, which is not due to the magnetic resistance
of the impurity phase of the Bi whose magnetic resistivity reaches
300% at 5 K.