2007/06/30 by M. Bal, Jonathan R. Friedman, W. Chen +4 · 1 citation
Materials Science · Physics and Astronomy · #Magnetic properties of thin films #Magnetism in coordination complexes #Organic and Molecular Conductors Research #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1209/0295-5075/82/17005
published as Europhys. Lett., 82, 17005 (2008) · 6 RevTeX pages, including 4 EPS figures, version accepted for publication
openalex publication_date 2008/03/05 · arxiv created 2008/03/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We measure magnetization changes in a single crystal of the single-molecule magnet Fe 8 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 T 1 ∼40 ns.