Broadband optical measurement of AC magnetic susceptibility of magnetite nanoparticles

Soucaille, R.; Sharifabad, M.E.; Telling, N.D.; Hicken, R.J.

doi:10.1063/1.5140362

Broadband optical measurement of AC magnetic susceptibility of magnetite nanoparticles

Soucaille, R.; Sharifabad, M.E.; Telling, N.D.; Hicken, R.J.

Authors

R. Soucaille

M.E. Sharifabad

Neil Telling n.d.telling@keele.ac.uk

R.J. Hicken

Abstract

Characterization of magnetic nanoparticles in solution is challenging due to the interplay between magnetic relaxation and agglomeration. The AC magnetic susceptibility of magnetite nanoparticles in water has been studied using magneto-optical methods in the frequency range of 10?Hz–250?kHz. The Faraday effect is detected simultaneously with changes in the fluid configuration. It is shown that the relative sensitivity to the magnetic and structural response can be adjusted by varying the wavelength, paving the way toward spatially resolved studies at the micro-scale.
The authors gratefully acknowledge the financial support of the UK Engineering and Physical Sciences Research Council (EPSRC) through Research Grant No. EP/P011403/1.

Journal Article Type	Article
Acceptance Date	Jan 28, 2020
Publication Date	Feb 10, 2020
Journal	Applied Physics Letters
Print ISSN	0003-6951
Publisher	AIP Publishing
Peer Reviewed	Peer Reviewed
Volume	116
Issue	6
Pages	062404 - 062404
DOI	https://doi.org/10.1063/1.5140362
Keywords	AC magnetic susceptibility, magnetite nanoparticles.
Publisher URL	https://aip.scitation.org/doi/10.1063/1.5140362