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arXiv 0712.3792cond-mat.mes-hall
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机械共振器引起的核自旋弛豫

Nuclear spin relaxation induced by a mechanical resonator

C. L. Degen, M. Poggio, H. J. Mamin, D. Rugar

摘要:

我们报告的测量自旋寿命的核自旋强耦合到微机械悬臂用于磁共振力显微镜。我们发现统计核极化的标架关联时间是由悬臂梁热运动产生的磁机械噪声决定的。证据基于三个参数的影响:(1)磁场梯度(耦合强度),(2)自旋的拉比频率(跃迁能),以及(3)低频机械模式的温度。实验结果进行了比较弛豫率从磁机械噪声的谱密度计算。

英文摘要:

We report on measurements of the spin lifetime of nuclear spins strongly coupled to a micromechanical cantilever as used in magnetic resonance force microscopy. We find that the rotating-frame correlation time of the statistical nuclear polarization is set by the magneto-mechanical noise originating from the thermal motion of the cantilever. Evidence is based on the effect of three parameters: (1) the magnetic field gradient (the coupling strength), (2) the Rabi frequency of the spins (the transition energy), and (3) the temperature of the low-frequency mechanical modes. Experimental results are compared to relaxation rates calculated from the spectral density of the magneto-mechanical noise.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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