Chiral Spin Bobbers in Exchange-Coupled Hard-Soft Magnetic Bilayers

1 Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA 2 NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA 3 Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA 4 Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA 5 Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA 6 Division of Materials Science and Engineering, Ames Laboratory, Ames, Iowa 50011, USA 7 Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA 8 Quantum Materials Center, University of Maryland, College Park, Maryland 20742, USA