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2004

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/13274

Magnetic long-range order induced by quantum ralaxation in single-molecule magnets

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http://dx.doi.org/10.1103/PhysRevLett.93.117202

Resum

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.

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Materials, Propietats magnètiques

Matèries (anglès)

Magnetic properties and materials

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Articles publicats en revistes (Química Inorgànica i Orgànica)

Citació

EVANGELISTI, Marco, et al. Magnetic long-range order induced by quantum ralaxation in single-molecule magnets. Physical Review Letters. 2004. Vol. 93, num. 11, pags. 117202-1-117202-4. ISSN 0031-9007. [consulted: 28 of June of 2026]. Available at: https://hdl.handle.net/2445/13274

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