Quantitative measurement of the magnetic moment of an individual magnetic nanoparticle by magnetic force microscopy

Details Quantitative measurement of the magnetic moment of an individual magnetic nanoparticle by magnetic force microscopy Quantitative measurement of the magnetic moment of an individual magnetic nanoparticle by magnetic force microscopy

2010-02-19

arxiv.org/abs/1002.3739v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 3 figures

Scientific paper

We demonstrate the quantitative measurement of the magnetization of individual magnetic nanoparticles (MNP) using a magnetic force microscope (MFM). The quantitative measurement is realized by calibration of the MFM signal using an MNP reference sample with traceably determined magnetization. A resolution of the magnetic moment of the order of 10^(-18) Am^2 under ambient conditions is demonstrated which is presently limited by the tip's magnetic moment and the noise level of the instrument. The calibration scheme can be applied to practically any MFM and tip thus allowing a wide range of future applications e.g. in nanomagnetism and biotechnology.

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