On the dependence of magnetization kinetics of ferrofluid on concentration of magnetic particles and variations of the internal sctrucutre | Izvestiya vuzov. Fizika. 2019. № 10. DOI: 10.17223/00213411/62/10/176

On the dependence of magnetization kinetics of ferrofluid on concentration of magnetic particles and variations of the internal sctrucutre

The paper presents the results of an investigation of the magnetization relaxation processes in ensemble of magnetic nanoparticles. Experimental results provide the nonlinear dependence of the magnetic susceptibility on the volume concentration of magnetic nanoparticles. Dependences of the magnetization relaxation time on the concentration of magnetic nanoparticles and temperature are determined from analysis of the frequency dependence and temperature dependence of the magnetic susceptibility. A non-monotonic dependence of the magnetization relaxation time on the concentration of magnetic particles. It was investigated that temperature dependence of magnetic susceptibility is close to exponential and similar to a system of interacting dipole particles in the state of the dipole glass. The established features of the magnetization relaxation processes are associated with the interaction of particles and the change in the structure of the ensemble of magnetic particles.

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Keywords

магнитные наночастицы, магнитная восприимчивость, суперпарамагнетизм, магнитная релаксация, magnetic nanoparticles, magnetic susceptibility, superparamagnetism, polidispersity, magnetization relaxation

Authors

Name	Organization	E-mail
Dikansky Yu.I.	North-Caucasian federal university, Institute of Mathematics and Natural Science	dikansky@mail.ru
Ispiryan A.G.	North-Caucasian federal university, Institute of Mathematics and Natural Science	anna.hay@list.ru
Kunikin S.A.	North-Caucasian federal university, Institute of Mathematics and Natural Science	skunikin@yandex.ru

Всего: 3

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