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

  • Wei Huang1Email author,

    Affiliated with

    • Jianmin Wu1,

      Affiliated with

      • Wei Guo1,

        Affiliated with

        • Rong Li1 and

          Affiliated with

          • Liya Cui1

            Affiliated with

            Nanoscale Research Letters20072:155

            DOI: 10.1007/s11671-007-9047-7

            Received: 10 December 2006

            Accepted: 8 February 2007

            Published: 13 March 2007


            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


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