Abstract: Magnetic properties of ɛ-Fe2O3nanoparticles supported on silica with the average size of few nanometers, narrow size distribution and no admixture of any other iron oxide polymorphs are investigated. The investigation of the temperature behavior of magnetization within the temperature range from 4.2 to 1000 K revealed the presence of several magnetic subsystems in the species under study. The temperatures’ behavior of the magnetic moment value indicates ferrimagnetic ordering in the ɛ-Fe2O3nanoparticles with a Curie temperature of about 800 K and points to the existence of a significant paramagnetic contribution becoming apparent at low temperatures. According to the electron spin resonance data, the particles possess superparamagnetic behavior at temperature higher ∼120 K. The model of the magnetic structure of monophase system of few nanometers ɛ-Fe2O3nanoparticles supported on silica is proposed.

Cite: Yakushkin S.S. , Dubrovskiy A.A. , Balaev D.A. , Shaykhutdinov K.A. , Bukhtiyarova G.A. , Martyanov O.N.
Magnetic Properties of Few Nanometers ɛ-Fe2O3 Nanoparticles Supported on the Silica
Journal of Applied Physics. 2012. V.111. N4. P.044312. DOI: 10.1063/1.3686647 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Nov 1, 2011
Accepted:	Jan 23, 2012
Published print:	Feb 15, 2012
Published online:	Feb 23, 2012

Identifiers:

Web of science:	WOS:000300948600090
Scopus:	2-s2.0-84857852078
Elibrary:	17979159
Chemical Abstracts:	2012:280113
Chemical Abstracts (print):	156:301081
OpenAlex:	W2012694739

Citing:

DB	Citing
Web of science	26
Scopus	26
Elibrary	28
OpenAlex	26

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