MoS_2, MoSe_2 and WSe_2 thin flakes were fabricated by the standard micromechanical cleavage procedures. The thickness and the optical contrast of the atomic th
La-doped Sr-hexaferrite(Sr_(1-x)La_xFe_(12)O_(19))(x=0.05,0.10,0.15,0.20) nanopowders with particle size ranging from 80 to 110 nm were successfully synthesized