Institution: | (1) Institute of Physics, Acad. Sci. CR, Na Slovance 2, CZ-182 21 Praha 8, Czech Republic;(2) Institute of Physics of Materials, Acad. Sci. CR, i kova 22, CZ-616 62 Brno, Czech Republic;(3) Max-Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany |