Maser D, Pandey S, Ring H, Ledbetter M P, Knappe S, Kitching J, Budker D
Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA.
Rev Sci Instrum. 2011 Aug;82(8):086112. doi: 10.1063/1.3626505.
We present magnetic detection of a single, 2 μm diameter cobalt microparticle using an atomic magnetometer based on a microfabricated vapor cell. These results represent an improvement by a factor of 10(5) in terms of the detected magnetic moment over previous work using atomic magnetometers to detect magnetic microparticles. The improved sensitivity is due largely to the use of small vapor cells. In an optimized setup, we predict detection limits of 0.17 μm(3).
我们展示了使用基于微纳加工蒸汽室的原子磁力计对单个直径为2μm的钴微粒进行磁检测。这些结果表明，在检测磁矩方面，相较于之前使用原子磁力计检测磁性微粒的工作，有了10⁵倍的提升。灵敏度的提高很大程度上归功于使用了小型蒸汽室。在优化设置下，我们预测检测限为0.17μm³。
