  An oxyborate Co2AlBO5 belonging to the ludwigite family is investigated using
structural, thermodynamic, dielectric and magnetic measurements. Magnetic
measurements indicate that this system is seen to exhibit long range magnetic
ordering at T{_N} = 42 K, signatures of which are also seen in the specific
heat, dielectric susceptibility, and the lattice parameters. The absence of a
structural phase transition down to the lowest measured temperatures,
distinguishes it from the more extensively investigated Fe-based ludwigites. At
low temperatures, the system is seen to stabilize in a reentrant superspin
glass phase at T{_G} = 10.6 K from within the magnetically ordered state. This
ground state is also characterized by magnetic field induced metamagnetic
transitions, which at the lowest measured temperatures exhibit a number of
sharp magnetization steps, reminiscent of that observed in the mixed valent
manganites.
