Proton NMR for Measuring Quantum-Level Crossing in the Magnetic Molecular Ring Fe10

Details Proton NMR for Measuring Quantum-Level Crossing in the Magnetic Molecular Ring Fe10 Proton NMR for Measuring Quantum-Level Crossing in the Magnetic Molecular Ring Fe10

1999-05-24

arxiv.org/abs/cond-mat/9905346v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Four pages, to appear in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.83.227

The proton nuclear spin-lattice relaxation rate 1/T1 has been measured as a function of temperature and magnetic field (up to 15 T) in the molecular magnetic ring Fe10. Striking enhancement of 1/T1 is observed around magnetic field values corresponding to a crossing between the ground state and the excited states of the molecule. We propose that this is due to a cross-relaxation effect between the nuclear Zeeman reservoir and the reservoir of the Zeeman levels of the molecule. This effect provides a powerful tool to investigate quantum dynamical phenomena at level crossing.

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