2026-04-17T05:40:14Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/132742025-12-05T01:35:06Zcom_2072_1057col_2072_478917col_2072_478933

00925njm 22002777a 4500 dc Evangelisti, Marco author Luis Vitalla, Fernando author Mettes, F. L. author Aliaga-Alcalde, Núria author Aromí Bedmar, Guillem author Alonso, J. J. author Christou, G. author Jongh, L. J. de author 2010-07-05T09:35:20Z 2010-07-05T09:35:20Z 2004 Can magnetic interactions between single-molecule magnets (SMMs) in a crystal establish long-range magnetic order at low temperatures deep in the quantum regime, where the only electron spin fluctuations are due to incoherent magnetic quantum tunneling (MQT)? Put inversely: can MQT provide the temperature dependent fluctuations needed to destroy the ordered state above some finite Tc, although it should basically itself be a T-independent process? Our experiments on two novel Mn4 SMMs provide a positive answer to the above, showing at the same time that MQT in the SMMs has to involve spin-lattice coupling at a relaxation rate equaling that predicted and observed recently for nuclear-spin-mediated quantum relaxation. Materials Propietats magnètiques Magnetic properties and materials Magnetic long-range order induced by quantum ralaxation in single-molecule magnets