title: Coherent manipulation and decoherence of s=10 single-molecule magnets.
abstract: We report coherent manipulation of S=10 Fe8 single-molecule magnets. The temperature dependence of the spin decoherence time T2 measured by high-frequency pulsed electron paramagnetic resonance indicates that strong spin decoherence is dominated by Fe8 spin bath fluctuations. By polarizing the spin bath in Fe8 single-molecule magnets at magnetic field B=4.6 T and temperature T=1.3 K, spin decoherence is significantly suppressed and extends the spin decoherence time T2 to as long as 712 ns. A second decoherence source is likely due to fluctuations of the nuclear spin bath. This hints that the spin decoherence time can be further extended via isotopic substitution to smaller nuclear magnetic moments.
authors.affiliation: Department of Physics and Center for Terahertz Science and Technology, University of California, Santa Barbara, California 93106, USA. susumu@iqcd.ucsb.edu
authors.forename: Susumu
authors.initials: S
authors.lastname: Takahashi
authors.forename: Johan
authors.initials: J
authors.lastname: van Tol
authors.forename: Christopher C
authors.initials: CC
authors.lastname: Beedle
authors.forename: David N
authors.initials: DN
authors.lastname: Hendrickson
authors.forename: Louis-Claude
authors.initials: LC
authors.lastname: Brunel
authors.forename: Mark S
authors.initials: MS
authors.lastname: Sherwin