Proton NMR for measuring quantum level crossing in the magnetic molecular ring Fe10

被引：76

作者：

Julien, MH ^{[1
]}

Jang, ZH

Lascialfari, A

Borsa, F

Horvatic, M

Caneschi, A

Gatteschi, D

机构：

[1] Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA

[2] Dipartimento Fis A Volta, I-27100 Pavia, Italy

[3] Unita INFM Pavia, I-27100 Pavia, Italy

[4] CNRS, High Field Magnet Lab, F-38042 Grenoble 9, France

[5] MPI FKF, F-38042 Grenoble 9, France

[6] Univ Florence, Dept Chem, I-50144 Florence, Italy

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.83.227

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The proton nuclear spin-lattice relaxation rate 1/T-1 has been measured as a function of temperature and magnetic field (up to 15 T) in the molecular magnetic ring Fe-10(OCH3)(20)(O2CCH2Cl)(10) (Fe10). Striking enhancement of 1/T-1 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.

引用

页码：227 / 230

页数：4

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