Magnetic and transport properties of Mn-doped Bi2Se3 and Sb2Se3

We report on the single crystal growth and thermoelectric and magnetic properties of Mn-doped Bi2Se3 and Sb2Se3 single crystals prepared by the temperature gradient solidification method. The composition and crystal structure were determined using electron probe microanalysis and theta-2 theta powder X-ray diffraction studies, respectively. The lattice constants of several percent Mn-doped Bi2Se3 and Sb2Se3 were slightly smaller than those of the undoped sample due to the smaller Mn atomic radius (1.40 angstrom) than those of Bi (1.60 angstrom) and Sb (1.45 angstrom). Mn-doped Bi2Se3 and Sb2Se3 showed spin-glass and paramagnetic properties, respectively. (C) 2006 Elsevier B.V. All rights reserved.