Critical Scattering and Dynamical Scaling in an Heisenberg Ferromagnet Neutron Spin Echo versus Renormalization Group Theory

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dc.creatorAlba, Michel
dc.creatorPouget, Stephanie
dc.creatorFouquet, Peter
dc.creatorFarago, Bela
dc.creatorPappas, Catherine
dc.date2007-03-27
dc.date.accessioned2026-07-07T07:54:01Z
dc.date.available2026-07-07T07:54:01Z
dc.descriptionHigh resolution Neutron Spin Echo (NSE) spectroscopy was used to investigate the dynamics of an 3D Heisenberg ferromagnet in the exchange-controlled regime over a broad range of temperatures and momentum transfer. These results allow for the first time an extensive comparison between the experimental dynamical critical behavior and the predictions of the Renormalization Group (RG) theory. The agreement is exhaustive and surprising as the RG theory accounts not only for the critical relaxation but also for the shape crossover towards an exponential diffusive relaxation when moving from the critical to the hydrodynamic regime above $T_C$.
dc.description4 pages, 5 figures, letter submitted to Phys.Rev. Lett., 03/26/2007
dc.identifierhttps://arxiv.org/abs/cond-mat/0703702
dc.identifierhttp://arxiv.org/abs/cond-mat/0703702
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126444
dc.subjectStatistical Mechanics
dc.titleCritical Scattering and Dynamical Scaling in an Heisenberg Ferromagnet Neutron Spin Echo versus Renormalization Group Theory
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