Evidencing under-barrier phenomena in a Yb(III) SMM: a joint luminescence/neutron diffraction/SQUID study. - Guégan, Frédéric; Jung, Julie; Le Guennic, Boris; Riobé, François; Maury, Olivier; Gillon, Béatrice; Jacquot, Jean-François; Guyot, Yannick; Morell, Christophe; Luneau, Dominique (Inorganic Chemistry Frontiers, 2019)