A Research on Magnetic Properties of Ferromagnetic Liquid γ–Fe₂O₃

Abstract:

This paper explains how to make ferrimagnetic ferrofluid r-Fe₂O₃ with chemical precipitation. First, ferrimagnetic nanoparticle r-Fe₂O₃ is produced with chemical coprecipitation. Then, the ferrofluid r-Fe₂O₃ is synthesized by Massart method. Without magnetic field, the interaction energy of two r-Fe₂O₃particles is about 1.92×10-19J, which is more than heat energy and is easy to form a reunion. There exist ring-like structure in ferrofluidr-Fe₂O₃, which has no contribution to the saturation magnetization. The saturation magnetization is less than the theoretical value. The bigger the volume fraction, the more self-assembly ring structure, the less possible it is to crack in the process of dilution and magnetization.

• Periodical: Applied Mechanics and Materials (Volumes 246-247)
• Pages: 1091-1095
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.246-247.1091
• Online since: December 2012
• Authors: An Rong Wang, Hai Yan Huang, Chun Jun Shu
• Keywords: Ferrofluid, Magnetization, Self-Assemble

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