Application of atomic magnetometry in magnetic particle detection
Instrumentation and Detectors
2009-11-13 v1 Atomic Physics
Abstract
We demonstrate the detection of magnetic particles carried by water in a continuous flow using an atomic magnetic gradiometer. Studies on three types of magnetic particles are presented: a single cobalt particle (diameter ~150 um, multi-domain), a suspension of superparamagnetic magnetite particles (diameter \~1 um), and ferromagnetic cobalt nanoparticles (diameter ~10 nm, 120 kA/m magnetization). Estimated detection limits are 20 um diameter for a single cobalt particle at a water flow rate 30 ml/min, 5x10^3 magnetite particles at 160 ml/min, and 50 pl for the specific ferromagnetic fluid at 130 ml/min. Possible applications of our method are discussed.
Keywords
Cite
@article{arxiv.physics/0609197,
title = {Application of atomic magnetometry in magnetic particle detection},
author = {S. Xu and M. H. Donaldson and A. Pines and S. M. Rochester and D. Budker and V. V. Yashchuk},
journal= {arXiv preprint arXiv:physics/0609197},
year = {2009}
}
Comments
10 pages, 4 figures