Institute of Fundamental Technological Research
Polish Academy of Sciences

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K. Madrak


Recent publications
1.  Szczytko J., Vaupotic N., Madrak K., Sznajder P., Górecka E., Magnetic moment of a single metal nanoparticle determined from the Faraday effect, PHYSICAL REVIEW E, ISSN: 1539-3755, DOI: 10.1103/PhysRevE.87.033201, Vol.87, No.3, pp.033201-1-6, 2013

Abstract:
Optical properties of a composite material made of ferromagnetic metal nanoparticles embedded in a dielectric host are studied. We constructed an effective dielectric tensor of the composite material taking into account the orientational distribution of nanoparticle magnetic moments in external magnetic field. A nonlinear dependence of the optical rotation on magnetic field resulting from the reorientation of nanoparticles is demonstrated. The theoretical findings were applied to the magneto-optical experimental data of cobalt ferromagnetic nanoparticles embedded in a dielectric liquid host. The dependence of the Faraday rotation on Co-based ferromagnetic nanoparticles was measured as a function of the external magnetic field, varying the size of nanoparticles and the wavelength of light. The proposed approach enables quantitative determination of the magnetic moment and the plasma frequency of a single nanoparticle, and from this the size of the nonmagnetic shell of magnetic nanoparticles.

Affiliations:
Szczytko J. - other affiliation
Vaupotic N. - other affiliation
Madrak K. - other affiliation
Sznajder P. - other affiliation
Górecka E. - other affiliation

Patents
Filing No./Date
Filing Publication
Autors
Title
Protection Area, Applicant Name
Patent Number
Date of Grant
pdf
402159
2012-12-20
BUP 13/2014
2014-06-23
Szczytko J., Górecka E., Vaupotic N., Madrak K., Sznajder P., Osewski P., Turski H., Pociecha D.
Method for determining the the magnetization of the magnetic nanoparticles and a device for determining the magnetization of the magnetic nanoparticles
PL, Uniwersytet Warszawski
222392
WUP 07/2016
2016-07-29



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