AUTHORS
Mihals Scepanski, Andres Jakovics, University of Latvia, Riga, Latvia, Imants Kaldre, Institute of Physics of University of Latvia, Salaspils, Latvia, Walter Holweger, Schaeffler Technologies AG & Co. KG, Herzogenaurach, Germany and Bernard Nacke, Leibniz University of Hanover, Institute of Electrotechnology, Germany