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Magnetic moment measurement of magnetic nanoparticles using atomic force microscopy

J-W Park1, I S Yoo2, W-S Chang3, E-C Lee1, H Ju1, B H Chung4 and B S Kim5

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TECHNICAL DESIGN NOTE

Magnetic moment per unit mass of magnetic nanoparticles was found by using the atomic force microscope (AFM). The mass of the nanoparticles was acquired from the resonance frequency shift of the particle-attached AFM probe and magnetic force measurement was also carried out with the AFM. Combining with magnetic field strength, the magnetic moment per unit mass of the nanoparticles was determined as a function of magnetic field strength.


PACS

75.30.Cr Saturation moments and magnetic susceptibilities

75.50.Tt Fine-particle systems; nanocrystalline materials

75.75.+a Magnetic properties of nanostructures

68.37.Ps Atomic force microscopy (AFM)

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 1 (January 2008)

Received 14 August 2007, in final form 6 November 2007

Published 17 December 2007



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