Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Fe50 Mn50 films; Cu underlayer; migration;