Quantitative Measurement of the Magnetic Moment of Individual Magnetic Nanoparticles by Magnetic Force Microscopy
Journal article, 2012
The quantitative measurement of the magnetization of individual magnetic nanoparticles (MNPs) using magnetic force microscopy (MFM) is described. 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 A m2 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 magnetic force microscope and tip, thus allowing a wide range of future applications, for example in nanomagnetism and biotechnology.
superparamagnetic nanoparticles
dipole
tips
magnetic properties
nanoparticles
magnetic force microscopy
paramagnetism
calibration
Author
S. Sievers
Physikalisch-Technische Bundesanstalt
K. F. Braun
Physikalisch-Technische Bundesanstalt
D. Eberbeck
Physikalisch-Technische Bundesanstalt
Stefan Gustafsson
Chalmers, Applied Physics, Eva Olsson Group
SuMo Biomaterials
Eva Olsson
Chalmers, Applied Physics, Eva Olsson Group
H. W. Schumacher
Physikalisch-Technische Bundesanstalt
U. Siegner
Physikalisch-Technische Bundesanstalt
Small
1613-6810 (ISSN) 1613-6829 (eISSN)
Vol. 8 17 2675-2679Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1002/smll.201200420