  We report measurements on single crystals of orthorhombic CeNiGe2, which is
found to exhibit highly anisotropic magnetic and transport properties. The
magnetization ratio M(H//b)/M(H^b) at 2 K is observed to be about 18 at 4 T and
the electrical resistivity ratio r//b/r^b is about 70 at room temperature. It
is confirmed that CeNiGe2 undergoes two-step antiferromagnetic transition at 4
and 3 K, as reported for polycrystalline samples. The application of magnetic
field along the b axis (the easy magnetization axis) stabilizes a ferromagnetic
correlation between the Ce ions and enhances the hopping of carriers. This
results in large negative magnetoresistance along the b axis.
