Magnetic Fluid의 전자기적 특성 연구

민의홍; 고재귀; Eui Hong Min; Jae Gui Koh

Korean Journal of Materials Research, Vol.14, No.9, 659-663, September, 2004

DOI10.3740/MRSK.2004.14.9.659 Export Citation

Magnetic Fluid의 전자기적 특성 연구

A Study of Electromagnetic Properties on Magnetic Fluids

민의홍, 고재귀^†

숭실대학교 물리학과

Eui Hong Min, and Jae Gui Koh^†

Department of Physics, Soongsil University, Seoul 157-743, Korea

E-mail:

Magnetite was prepared by wet method and oil-based magnetic fluid also was prepared by its magnetite. Ahead of making magnetite, we investigated the variation of physical properties for changing Fe 3+ /Fe 2+ . Through the variation of the process mixing time, pH, magnetite content, we made magnetic fluid of magnetite. We examined the magnetic and frequency property by a toroidal mold. In result Fe 3+ /Fe 2+ =1.2 , over the minute mixing time property of magnetite, Ms was 61.98 emu/g. Moreover, the B-H loop result indicated that the magnetic fluid followed paramagnetic behavior.

Keywords:magnetic fluid;property of magnetite;paramagnetic;magnetite

[References]

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[1] Park JW, Lee JH, Seo LS, J. Kor. Mag. Soc., 11(6), 245 (2001)

[2] Cullity, 'Introduction to Magnetic Materials', p.185, Addison Wesley Publishing (1972) (1972)

[3] Koh JG, Song JM, 'Basic and Application of Magnetic physics', p.128, Soong Sil Univ. Press, Seoul (2001) (2001)

[4] Papell SS, U.S. Patent No.3215572 (1965) (1965)

[5] Cho MH, Kim M, Min DJ, Oh JH, J. Kor. Ceramic. Soc., 33(8), 901 (1996)

[6] Bashtovoy VG, Berkovsky BM, Vislovich AN, 'Introduction to Thermalmechanics of Magnetic Fluids', p.1, Hemisphere Publishing Co. (1987) (1987)

[7] Rosenweig RE, 'Ferrohydrodynamics', p.7, Cambridge Univ. Press (1985) (1985)

[8] Ryu SO, Park JW, Choi BH, Seo LS, J. Kor. Mag. Soc., 10(1), 42 (2000)

[9] Rosenweig RE, 'Ferrohydrodynamics', p.54, Cambridge Univ. Press (1985) (1985)

[10] Chikazumi S, 'Physics of Magnetism', p.98, clarendon press, Oxford (1997) (1997)

[11] Charlles SW, Pappewell J, IEEE Trans. Magn. Mag., 16(2), 172 (1980)

[12] Goldowky H, IEEE Trans. Magn. Mag., 16(1), 382 (1980)

[13] Richard, 'Ferromagnetism', p.244, D Van Nostrano Com. INC (1951) (1951)

[14] Lee JH, Koh JG, J. Kor. Mag. Soc., 11(5), 217 (2001)

[15] Kim JS, Koh JG, Koh. J. Kor. Mag. Soc., 13(1), 15 (2003)