Zhijun Xu⁸, Yang Zhao^8,9, Jeffrey W. Lynn⁸, Tom Fennell¹⁰, Paul C. Canfield^4,5, Collin L. Broholm^2,11, and Tyrel M. McQueen^2,1,11

• ¹Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, USA
• ²Institute for Quantum Matter and William H. Miller III Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USA
• ³Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
• ⁴Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011, USA
• ⁵Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
• ⁶Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA
• ⁷Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8, Canada
• ⁸NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
• ⁹Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
• ¹⁰Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
• ¹¹Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA

• ^*Contact author: tberry@princeton.edu
• ^†Present address: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
• ^‡Contact author: vincent.morano@psi.ch
• ^§Present address: PSI Center for Neutron and Muon Sciences, Forschungsstrasse 111, 5232 Villigen, PSI, Switzerland.
• ^∥Present address: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
• ^¶Present address: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.