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Note: Detection of a single cobalt microparticle with a microfabricated atomic magnetometer



Svenja A. Knappe, D. Maser, S. Pandey, H. Ring, Micah P. Ledbetter, John E. Kitching, Dimitry Budkerl


Detection of the magnetic signal of a single, 2 {um}m cobalt microparticle using an atomic magnetometer based on a microfabricated vapor cell is presented. These results represent an improvement by a factor of 10 in terms of the detected magnetic moment over previous work using atomic magnetometers to detect magnetic microparticles. The improved sensitivity is largely due to the use of small vapor cells. In an optimized setup, we predict detection limits of 0.17 {um}m on a single transit through the magnetometer, making these methods attractive for a number of applications.
Review of Scientific Instruments


Atomic magnetometer, optical magnetometer, CSAM, microfabrication, microparticle, microfluidics


Knappe, S. , Maser, D. , Pandey, S. , Ring, H. , Ledbetter, M. , Kitching, J. and Budkerl, D. (2011), Note: Detection of a single cobalt microparticle with a microfabricated atomic magnetometer, Review of Scientific Instruments (Accessed June 23, 2024)


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Created August 23, 2011, Updated February 19, 2017