1. Faculty
of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany
2. Ernst
Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter
Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany
3. Institute
of Physics, Chinese Academy of Sciences, 100190 Beijing, China
4. High
Magnetic Field Laboratory, Chinese Academy of Sciences, 230031 Anhui, China
5. Center
for Functionalized Magnetic Materials (FunMagMa), Immanuel Kant Baltic Federal University, Kaliningrad, Russian Federation