1. Experimental Physics V, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86159 Augsburg, Germany.
2. Institute of Applied Physics, Academy of Sciences of Moldova, MD 2028 Chisinau, Republic of Moldova.
3. Hochfeld-Magnetlabor Dresden (HLD–European Magnetic Field Laboratory), Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany.