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  • Nano Express
  • Open Access

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

Nanoscale Research Letters20072:155

  • Received: 10 December 2006
  • Accepted: 8 February 2007
  • Published:


In this paper, the initial susceptibility of ε-Fe3N magnetic fluid at volume concentrations in the range Φ = 0.0 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 ε-Fe3N magnetic fluid samples. The viscosity of the ε-Fe3N magnetic fluid at the same concentrations is measured. The result shows that, the initial susceptibility of the low concentration ε-Fe3N magnetic fluid is proportional to the concentration. A linear relationship between relative viscosity and the volume fraction is observed when the concentration Φ < 0.02.


  • Magnetic fluid
  • Nano-material
  • Initial susceptibility
  • Viscosity




This work was supported by the national 863 project (No: 2002AA302608), from the Ministry of Science and Technology, China.

Authors’ Affiliations

Department of Functional Material Research, Central Iron & Steel Research Institute, Beijing, 100081, P. R, China


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