title: Quantum superposition of high spin states in the single molecule magnet Ni4.
abstract: Quantum tunneling of the magnetization in a single molecule magnet has been studied in experiments that combine microwave spectroscopy with high sensitivity magnetic measurements. By monitoring spin-state populations in the presence of microwave radiation, the energy splittings between low lying superpositions of high-spin states of single molecule magnet Ni4 (S=4) have been measured. Absorption linewidths give an upper bound on the rate of decoherence. Pulsed microwave experiments provide a measure of energy relaxation time, which is found to increase with frequency.
authors.affiliation: Department of Physics, New York University, 4 Washington Place, New York, New York 10003, USA.
authors.forename: E
authors.initials: E
authors.lastname: del Barco
authors.forename: A D
authors.initials: AD
authors.lastname: Kent
authors.forename: E C
authors.initials: EC
authors.lastname: Yang
authors.forename: D N
authors.initials: DN
authors.lastname: Hendrickson