2004/02/14 by M. Evangelisti, Marco Evangelisti, Fernando Luis +12 · 2 citations
Materials Science · Physics and Astronomy · #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #Organic and Molecular Conductors Research #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.93.117202
published as Phys. Rev. Lett. 93, 117202 (2004) · 4 pages, 3 figures
arxiv created 2004/02/14 · openalex publication_date 2004/09/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 T(c), 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.