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

(2) Department of Applied Physics; Berlin; Braunschweig; Chalmers University of Technology; Dietmar Eberbeck (1); Eva Olsson (2); Germany; Hans Werner Schumacher (1); Kai-Felix Braun (1); Sibylle Sievers (1)

arxiv: 1002.3739 · v1 · submitted 2010-02-19 · ❄️ cond-mat.mes-hall

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

Kai-Felix Braun (1) , Sibylle Sievers (1) , Dietmar Eberbeck (1) , Stefan Gustafsson (2) , Eva Olsson (2) , Hans Werner Schumacher (1) , Uwe Siegner (1) ((1) Physikalisch-Technische Bundesanstalt , Braunschweig

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Berlin Germany (2) Department of Applied Physics Chalmers University of Technology Sweden)

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keywords magneticmeasurementmomentquantitativecalibrationforceindividualmagnetization

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

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