Initial susceptibility and viscosity properties of low concentration ε-Fe₃N based magnetic fluid

• Main Authors: Huang Wei, Wu Jianmin, Guo Wei, Li Rong, Cui Liya
• Format: Article
• Language: English
• Published: SpringerOpen 2007-01-01
• Series: Nanoscale Research Letters
• Subjects: Magnetic fluid; Nano-material; Initial susceptibility; Viscosity
• Online Access: http://dx.doi.org/10.1007/s11671-007-9047-7
• ISSN: 1931-7573; 1556-276X

<p>Abstract</p><p>In this paper, the initial susceptibility of &#949;-Fe₃N magnetic fluid at volume concentrations in the range &#934; = 0.0 &#8764; 0.0446 are measured. Compared with the experimental initial susceptibility, the Langevin, Weiss and Onsager susceptibility were calculated using the data obtained from the low concentration &#949;-Fe₃N magnetic fluid samples. The viscosity of the &#949;-Fe₃N magnetic fluid at the same concentrations is measured. The result shows that, the initial susceptibility of the low concentration &#949;-Fe₃N magnetic fluid is proportional to the concentration. A linear relationship between relative viscosity and the volume fraction is observed when the concentration &#934; &lt; 0.02.</p>