  High-quality and sizable single crystals are crucial for studying the
intrinsic properties of unconventional superconductors, which are lacking in
the 1111 phase of the Fe-based superconductors. Here we report the successful
growth of CaFeAsF single crystals with the sizes of 1-2 mm using the self-flux
method. Owning to the availability of the high-quality single crystals, the
structure and transport properties were investigated with a high reliability.
The structure was refined by using the single-crystal x-ray diffraction data,
which confirms the reports earlier on the basis of powder data. A clear anomaly
associated with the structural transition was observed at 121 K from the
resistivity, magnetoresistance, and magnetic susceptibility measurements.
Another kink-feature at 110 K, most likely an indication of the
antiferromagnetic transition, was also detected in the resistivity data. Our
results supply a basis to propel the physical investigations on the 1111 phase
of the Fe-based superconductors.
