  We report on molecular beam epitaxy and properties of a magnetic topological
insulator, Cr doped Sb2Te3. The composition analysis reveals that Cr replaces
Sb site, and x-ray diffraction confirms that single phase textured crystal
structure can be obtained for (CrxSb1-x)2Te3 with x up to 0.44. Further
increase in x results in phase separation or precipitates in the material. The
Curie temperature TC increases with x up to 0.44, and reaches to 250 K, which
is the highest TC observed till now in magnetically doped topological
insulators.
