Spin lifetime in small ensembles of electron spins measured by magnetic resonance force microscopy
Spin lifetime in small ensembles of electron spins measured by magnetic resonance force microscopy
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DOI：
10.1103/physrevb.84.220405
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发表时间：
2011-12-08
影响因子：
3.7
通讯作者：
Hammel, P. C.
中科院分区：
文献类型：
--
作者：
Fong, K. C.;Herman, M. R.;Hammel, P. C.
磁共振力显微镜可以实现自旋寿命的纳米级成像。我们报告了用这种技术测量自旋极化统计波动（自旋噪声）的自旋相关时间tau(m)的温度依赖测量。控制了自旋-悬臂耦合引起的磁力学松弛，表征了影响微观信号自旋相关时间的伪机制。这些测量结果对优化自旋灵敏度、理解局部自旋动力学和纳米级成像具有重要意义。
Magnetic resonance force microscopy can enable nanoscale imaging of spin lifetime. We report temperature-dependent measurements of the spin correlation time tau(m) of the statistical fluctuations of the spin polarization-the spin noise-of ensembles containing similar to 100 electron spins by this technique. Magnetomechanical relaxation due to spin-cantilever coupling was controlled and spurious mechanisms that can affect the spin correlation time of the microscopic signal were characterized. These measurements have ramifications for optimizing spin sensitivity, understanding local spin dynamics, and for nanoscale imaging.