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Magnetic properties of maghemite nanoparticles |
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| Authors: | V. N. Nikiforov A. E. Goldt E. A. Gudilin V. G. Sredin V. Yu. Irhin |
| Affiliation: | 1. Department of Low-Temperature Physics, Moscow State University, Moscow, 119991, Russia 2. ANO Scientific Innovation Center for Space Rocket Hardware (NITs RKT), Moscow, 127642, Russia 3. Institute for Metal Physics, Ural Branch, Russian Academy of Science, Yekaterinburg, 620041, Russia |
| Abstract: | Magnetic particles of maghemite (spinel γ-Fe2O3) 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-Fe2O3 nanoparticles than for bulk samples. Several parameters of the material are estimated by comparing the experimental and calculated results. |
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