Título:
|
Magnetic long-range order induced by quantum ralaxation in single-molecule magnets
|
Autor/a:
|
Evangelisti, M.; Luis, F.; Mettes, F. L.; Aliaga, N. (Núria); Aromí Bedmar, Guillem; Alonso, J. J.; Christou, G.; Jongh, L. J. de
|
Otros autores:
|
Universitat de Barcelona |
Abstract:
|
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. |
Materia(s):
|
-Materials -Propietats magnètiques -Magnetic properties and materials |
Derechos:
|
(c) American Physical Society, 2004
|
Tipo de documento:
|
Artículo Artículo - Versión publicada |
Editor:
|
American Physical Society
|
Compartir:
|
|