Issue |
EPL
Volume 82, Number 1, April 2008
|
|
---|---|---|
Article Number | 17005 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/82/17005 | |
Published online | 05 March 2008 |
Radiation- and phonon-bottleneck–induced tunneling in the Fe8 single-molecule magnet
1
Department of Physics, Amherst College - Amherst, MA 01002-5000, USA
2
Department of Physics and Astronomy, Stony Brook University - Stony Brook, NY 11794, USA
3
Department of Physics, University of Massachusetts - Amherst, MA 01003, USA
4
Department of Chemistry and Biochemistry, University of California at San Diego - La Jolla, CA 92093, USA
Corresponding author: jrfriedman@amherst.edu
Received:
29
October
2007
Accepted:
5
February
2008
We measure magnetization changes in a single crystal of the single-molecule magnet Fe8 when exposed to intense, short (20
) 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.
PACS: 75.45.+j – Macroscopic quantum phenomena in magnetic systems / 75.50.Xx – Molecular magnets / 76.30.-v – Electron paramagnetic resonance and relaxation
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.