Origin of Magnetism in a Supposedly Nonmagnetic Osmium Oxide

S. Agrestini (Corresponding author), F. Borgatti, P. Florio, J. Frassineti, D. Fiore Mosca, Q. Faure, B. Detlefs, C. J. Sahle, S. Francoual, J. Choi, M. Garcia-Fernandez, K.-J. Zhou, V. F. Mitrović, P. M. Woodward, G. Ghiringhelli, C. Franchini, F. Boscherini, S. Sanna, M. Moretti Sala (Corresponding author)