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Microwave absorption and magnetization tunneling in Mn12-acetate molecular clusters

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In this paper we study the effect of microwave absorption on the quantum relaxation rate of Mn12 molecular clusters. We have determined first the resonant frequencies of a microwave resonator containing a single crystal of Mn12-Acetate and measured initial isothermal magnetization curves while microwave power was put into the resonator. We have found that the tunneling rate changes one order of magnitude for certain frequencies. This suggests that the microwave shaking of the nuclear spin and molecular vibrational degrees of freedom is responsible for the huge increasing of the tunneling rate.

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The American Physical Society through the American Institute of Physics

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.67.220402

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Articles publicats en revistes (Física de la Matèria Condensada)

# metadata.dc.title[].value
Microwave absorption and magnetization tunneling in Mn12-acetate molecular clusters