2003/07/16 by Romain Giraud, R. Giraud, A. M. Tkachuk +2 · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.91.257204
4 figures
arxiv created 2003/07/16 · openalex publication_date 2003/12/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Multispin tunneling cross relaxations in an ensemble of weakly coupled Ho3+ ions, mediated by weak anisotropic dipolar interactions, can be evidenced by ac-susceptibility measurements in a high temperature regime. Based on a four-body representation, including the rare-earth nuclear spin, two-ion tunneling mechanisms can be attributed to both dipolar-biased tunneling and cotunneling processes. The coreversal involving entangled pairs of magnetic moments is discussed with a particular emphasis, giving new evidence to elucidate the many-body quantum dynamics in dipolar spin glasses.