Radiation- and phonon-bottleneck--induced tunneling in the Fe8 single-molecule magnet

Bal, M. and Friedman, Jonathan R. and Chen, W. and Tuominen, M. T. and Beedle, C. C. and Rumberger, E. M. and Hendrickson, D. N.. (2008) Radiation- and phonon-bottleneck--induced tunneling in the Fe8 single-molecule magnet. EPL (Europhysics Letters), 82 (1). p. 17005. ISSN 0295-5075

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We measure magnetization changes in a single crystal of the single-molecule magnet Fe8 when exposed to intense, short (≤20 μs) pulses of microwave radiation resonant with the m = 10 to 9 transition. We find that radiation induces a phonon bottleneck in the system with a time scale of ~5 μs. The phonon bottleneck, in turn, drives the spin dynamics, allowing observation of thermally assisted resonant tunneling between spin states at the 100 ns time scale. Detailed numerical simulations quantitatively reproduce the data and yield a spin-phonon relaxation time T1~40 ns.

Item Type: Article
InterNano Taxonomy: Nanoscale Objects and Nanostructured Materials > Engineered Molecules
Nanomanufacturing Characterization Techniques > Magnetic Characterization
Collections: Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing
Nanomanufacturing Research Collection
Depositing User: Moureen Kemei
Date Deposited: 04 Feb 2010 13:23
Last Modified: 19 Sep 2011 21:50
URI: http://eprints.internano.org/id/eprint/257

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