Debye-Based Frequency-Domain Magnetization Model for Magnetic Nanoparticles in Magnetic Particle Spectroscopy

Author

Wawrzik, Thilo ; Yoshida, Takashi ; Schilling, Meinhard ; Ludwig, Frank

Author_Institution

Inst. fuer Elektrische Messtech. und Grundlagen der Elektrotechnik, Tech. Univ. Braunschweig, Braunschweig, Germany

Volume

51

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

1

Lastpage

4

Abstract

Signal generation in magnetic particle imaging and magnetic particle spectroscopy is generally described via the Langevin function of superparamagnetism. To include the magnetization dynamics, the Langevin function is augmented with a frequency-dependent term derived from the linear Debye model. Here, we extend that expression to cover the dynamics of higher harmonics, where each harmonic is multiplied with a complex-valued weighting factor, obtaining a frequency-domain model for application in the context of viscosity-/binding-dependent magnetic particle spectroscopy measurements.

Keywords

frequency-domain analysis; imaging; magnetic particles; magnetisation; nanomagnetics; nanoparticles; spectroscopy; superparamagnetism; Langevin function; binding-dependent magnetic particle spectroscopy measurements; complex-valued weighting factor; debye-based frequency-domain magnetization model; frequency-dependent term; frequency-domain model; higher harmonics dynamics; linear Debye model; magnetic nanoparticles; magnetic particle imaging; magnetization dynamics; signal generation; superparamagnetism; viscosity-dependent magnetic particle spectroscopy measurements; Harmonic analysis; Imaging; Magnetic particles; Magnetization; Mathematical model; Nanoparticles; Viscosity; Magnetic particle spectroscopy (MPS); Magnetic particle spectroscopy,; Magnetic particles,; Nanoparticle; magnetic particles; modeling; nanoparticles;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2332371

Filename

6841635