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

M. -H. Julien·Z. H. Jang·A. Lascialfari·F. Borsa·M. Horvatic·A. Caneschi·D. Gatteschi
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Abstract

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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M. -H. Julien, Z. H. Jang, A. Lascialfari, F. Borsa, M. Horvatic, A. Caneschi, D. Gatteschi. 1999-05-24. Proton NMR for Measuring Quantum-Level Crossing in the Magnetic Molecular Ring Fe10. https://doi.org/10.1103/physrevlett.83.227

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