Magnetic Particle Imagining with a Cantilever Detector

Published

July 23, 2012

Author(s)

Jacob W. Alldredge, John M. Moreland

Abstract

We present a novel imaging method for the measuring the position and magnetic moment of single micrometer scale particles. Our technique is based on magnetic force microscopy (MFM) with a magnetically hard magnetic tip in a uniform opposing field. By translating the MFM probe tip laterally and vertically, the local magnetic field at a particle can be precisely controlled. Our technique is similar to magnetic particle imaging, where the harmonic response of the particle to an AC field is measured; the difference is that here, the response is measured with a cantilever instead of a detector coil. We are able to precisely determine individual particle positions to within π0.022 υm in a composite sample. In addition,by fitting the force derivative images taken at different distances above the sample and at different applied magnetic fields, we can determine the m-Hcharacteristics of individual particles.

Citation

Journal of Applied Physics

Volume

112

Pub Type

Journals

Keywords

Magnetic particle imagining, Magnetic Force microscopy, medical imaging

Citation

Alldredge, J. and Moreland, J. (2012), Magnetic Particle Imagining with a Cantilever Detector, Journal of Applied Physics (Accessed September 5, 2025)