Affiliation: | (1) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 117333, Russia;(2) Department of Physics, University of Helsinki, Siltavuorenpenger 20 I, P.O. Box 9, Helsinki, FIN-00014, Finland;(3) Moscow State University, Vorob’evy gory, Moscow, 119899, Russia |