Quantum Coherence in Fe8 Molecular Nanomagnets

Details Quantum Coherence in Fe8 Molecular Nanomagnets Quantum Coherence in Fe8 Molecular Nanomagnets

1998-10-20

arxiv.org/abs/cond-mat/9810261v2

Physics

Condensed Matter

10 pages, 4 figures

Scientific paper

10.1209/epl/i1999-00450-8

We report observation of coherent quantum oscilations in spin-10 Fe8 molecular clusters. The powder of magnetically oriented Fe8 crystallites was placed inside a resonator, in a dc magnetic field perpendicular to the magnetization axis. The field dependence of the ac-susceptibility was measured up to 5 T, at 680 MHz, down to 25 mK. Two peaks in the imaginary part of the susceptibility have been detected, whose positions coincide, without any fitting parameters, with the predicted two peaks corresponding to the quantum splitting of the ground state in the magnetic field parallel and perpendicular to the hard magnetization axis.

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