Quantitative Measurement of the Magnetic Moment of Individual Magnetic Nanoparticles by Magnetic Force Microscopy
Artikel i vetenskaplig tidskrift, 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.

dipole

calibration

magnetic force microscopy

magnetic properties

paramagnetism

tips

superparamagnetic nanoparticles

nanoparticles

Författare

S. Sievers

Physikalisch-Technische Bundesanstalt (PTB)

K. F. Braun

Physikalisch-Technische Bundesanstalt (PTB)

D. Eberbeck

Physikalisch-Technische Bundesanstalt (PTB)

Stefan Gustafsson

Chalmers, Teknisk fysik, Eva Olsson Group

SuMo Biomaterials

Eva Olsson

Chalmers, Teknisk fysik, Eva Olsson Group

H. W. Schumacher

Physikalisch-Technische Bundesanstalt (PTB)

U. Siegner

Physikalisch-Technische Bundesanstalt (PTB)

Small

1613-6810 (ISSN) 1613-6829 (eISSN)

Vol. 8 17 2675-2679

Ämneskategorier

Fysik

DOI

10.1002/smll.201200420