Institution: | a Research Institute of Electronics, Shizuoka University, Johoku 3-5-1, Hamamatsu 432-8011, Japan b Laboratory of Magnetism, Institute of Experimental Physics, University of Bialystok, 41 Lipowa Street, 15-424 Bialystok, Poland c Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland d Department of Physics, Technical University of Ostrava, 17 Listopadu 15, 708 33 Ostrava-Poruba, Czech Republic |