Magnetic phase diagram of interacting nanoparticle systems under the mean field model

Details Magnetic phase diagram of interacting nanoparticle systems under the mean field model Magnetic phase diagram of interacting nanoparticle systems under the mean field model

2011-01-21

arxiv.org/abs/1101.4061v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 4 figures, 1 table

Scientific paper

The disordered random-anisotropy magnetic nanoparticle systems with competing dipolar interactions and ferromagnetic exchange couplings are investigated by Monte Carlo simulations. Superspin glass (SSG) and superferromagnetic (SFM) behaviors are found at low temperatures depending on the interactions. Based on the mean field approximation, the Curie-Weiss temperature TCW = 0 is suggested as the phase boundary between the SSG systems and the SFM systems, which is convinced by the spontaneous magnetizations and relaxations. The magnetic phase diagram is plotted.

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