Direct measurement of the tunneling rate of the magnetization in Fe8 via 57Fe nuclear spin-lattice relaxation by strong collision

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dc.creatorBaek, S. H.
dc.creatorBorsa, F.
dc.creatorFurukawa, Y.
dc.creatorHatanaka, Y.
dc.creatorKawakami, S.
dc.creatorKumagai, K.
dc.date2004-09-24
dc.date2004-10-28
dc.date.accessioned2026-07-07T03:01:01Z
dc.date.available2026-07-07T03:01:01Z
dc.description$^{57}$Fe and $^1$H relaxation measurements have been performed in single crystal and oriented powder of enriched $^{57}$Fe8 molecular cluster in the temperature range 0.05--1.7 K in zero external field and with small perturbing longitudinal field ($< 1$ T). On the basis of the experimental results it is argued that in zero external field the nuclear spin-lattice relaxation ($1/T_1$) mechanism is driven by a strong collision mechanism whereby $1/T_1$ is a direct measure of the incoherent tunneling probability in the low lying magnetic energy states of the molecular nanomagnet. The approximate value of the effective tunneling rate vs $T$ and $H$ derived directly from $1/T_1$ is shown to be consistent with theoretical estimates based on known parameters of the Hamiltonian.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0409672
dc.identifierhttp://arxiv.org/abs/cond-mat/0409672
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24937
dc.subjectMesoscale and Nanoscale Physics
dc.titleDirect measurement of the tunneling rate of the magnetization in Fe8 via 57Fe nuclear spin-lattice relaxation by strong collision
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