Magnetic particles of maghemite (spinel γ-Fe 2 O 3 ) are synthesized by means of aerosol pyrolysis, making it possible to produce chemically uniform highly-dispersed single-phase materials. The magnetic properties of synthesized particles for temperatures ranging from helium temperature up to room temperature and higher are investigated using a SQUID magnetometer. The experimental curves are compared to the results from calculations performed by the Monte Carlo method. It is found that the Curie temperature is lower for γ-Fe 2 O 3 nanoparticles than for bulk samples. Several parameters of the material are estimated by comparing the experimental and calculated results.
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Nikiforov et al. (2014) studied this question.
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