Structures, Optical Properties and Potentially Electro-Optical Applications of Magnetic Fluid Films

Shieh-Yueh Yang; Herng-Er  Horng; Chin-Yih  Hong; Hong-Chang Yang

doi:10.6180/jase.2002.5.2.03

Structures, Optical Properties and Potentially Electro-Optical Applications of Magnetic Fluid Films

Physics

Shieh-Yueh Yang ¹ , Herng-Er Horng¹ , Chin-Yih Hong² and Hong-Chang Yang³

¹Department of Physics National Taiwan Normal University Taipei, Taiwan 116, R.O.C.
²Department of Mechanical Engineering Da-Yeh University Changhwa, Taiwan 515, R.O.C.
³Department of Physics National Taiwan University Taipei, Taiwan 106, R.O.C.

Received: April 1, 2002
Accepted: May 10, 2002
Publication Date: June 1, 2002

Download Citation: ||https://doi.org/10.6180/jase.2002.5.2.03

ABSTRACT

Under the action of externally-applied magnetic fields, a portion of magnetic particles was condensed out from the initially monodispersed magnetic fluid and formed into magnetic chains or columns, depending on the direction of the applied fields. These chains or columns evolved from a disordered phase to an ordered structural pattern as the field strength reached some critical value. It was further discovered that the optical properties, such as birefringence, transmission and magnetochromatics, were generated by the formation of the structures in the magnetic fluid films. With the tunability of the structural patterns by adjusting control parameters, the magnetic fluid films exhibited magnetically tunable optical properties. These phenomena bring up the promising feasibility of electro-optical devices, e.g. optical switch, filter, or grating by using homogeneous ferrofluid films.

Keywords: Magnetic Fluids, Structures, Optical, Tunable

REFERENCES

[1] Berkovski, B. Magnetic Fluids and Applications Handbook; Begell House, Inc. New York, U.S.A., 1996.
[2] Piso, M. I. J. Magn. Magn. Mater. 1999, 201, 380.
[3] Yamaguchi, H.; Kobori, I.; Kobayashi, N. J. Magn. Magn. Mater. 1999, 201, 260.
[4] Rosensweig, R. E. Nature 1966, 210, 613.
[5] Horng, H. E.; Hong, C. Y.; Yang, S. Y.; Yang, H. C. J. Phys. Chem. Solids 2001, 62, 1749.
[6] Hong, C. Y.; Chen, C. A; Chen, C. H.; Horng, H. E.; Yang, S. Y.; Yang, H. C. Appl. Phys. Letter. 2001, 79, 2360.
[7] Tsebers, A. O. Magn. Gidro. 1982, 18, 42 (in Russian). English translation: Magnetohydrodynamics, 1983, 18, 345.
[8] Sano, K.; Doi, M. J. Phys. Soc. Jpn. 1983, 52, 2810.
[9] Yusuf, N. A. J. Phys. D: Appl. Phys. 1989, 22, 1916.
[10] Hong, C. Y. R.; Horng, H. E.; Yang, H. C.; Yeung, W. B. U. S. Pat. No. 5948321.
[11] Horng, H. E.; Hong, C. Y.; Yang, H. C.; Jang, I. J.; Yang, S. Y.; Wu, J. M.; Lee, S. L.; Kuo, F. C., J. Magn. Magn. Mater. 1999, 201, 215.
[12] Hong, C.Y., J. Appl. Phys. 1999, 85, 5962.
[13] Horng, H. E. in preparation.
[14] Jones, G. A.; Niedoba, H. J. Magn. Magn. Mater. 1988, 73, 33.
[15] Jones, G. A.; Moman, A. IEEE Trans. Magn. 1990, 26, 1849.
[16] Cernak J.; Macko, P. J. Magn. Magn. Mater. 1993, 123, 107.
[17] Wang, Hao, Zhu, Yun, Boyd, C.; Luo, Weili, Cebers, A.; Rosensweig, R. E. Phys. Rev. Lett. 1994, 72, 1929.
[18] Ytreberg, F.; Marty, M.; Susan R. Phys. Rev. E 2000, 61, 4107.
[19] Hong, C. Y.; Horng, H. E.; Jang, I. J.; Hsu, C. J.; Yao, Y. D.; Yang, H. C. J. Appl. Phys. 1997, 81, 4275.
[20] Yang, S. Y.; Jang, I. J.; Horng, H. E.; Hong, C. Y.; Yang, H. C. Magn. Gidro. 2000, 36, 19.
[21] Hong, C. Y.; Horng, H. E.; Kuo, F. C.; Yang, S. Y.; Yang, H. C.; Wu, J. M. Appl. Phys. Lett. 1999, 75, 2196.
[22] Hong, C. Y.; Ho, C. H.; Horng, H. E.; Chen, C. h.; Yang, S. Y.; Chiu, Y. P.; Yang, H. C. Magn. Gidro. 1999, 35, 364.
[23] Horng, H. E. to be presented at OECC2002.
[24] Peterlin, A.; Stuart, H. A. Z. Phys. 1939, 112, 129.
[25] Taketomi, S.; Ogawa, S.; Miyajima, H.; Chikazumi, S. IEEE Trans. Magn. 1989, 4, 384.
[26] Xu, M.; Ridler, P. J. J. Appl. Phys. 1997, 82, .326.
[27] Yang, S. Y.; Tse, W. S.; Horng, H. E.; Yang, H. C.; Hong, Chin-Yih J. Magn. Magn. Mater. 2001, 226-230, 1992.
[28] Horng, H. E.; Yang, S. Y.; Lee, S. L.; Wu, J. M.; Jeng, J. T.; Hong, Chin-Yih, Yang, H. C. Magn. Gidro. 2000, 36, 39.
[29] Yang, S. Y.; Chiu, Y. P.; Horng, H. E.; Hong, Chin-Yih; Jeang, B. Y.; Yang, H. C. Appl. Phys. Lett. 2001, 79, 2372.
[30] Hong, Chin-Yih J. Magn. Magn. Mater. 1999, 201, 178.
[31] Horng, H. E.; Hong, C. Y.; Yeung, W. B.; Yang, H.C., Appl. Opt. 1998, 37, 2674.
[32] Horng, H. E.; Hong, C. Y.; Lee, S. L.; Ho, C. H.; Yang, S. Y.; Yang, H. C. J. Appl. Phys. 2000, 88, 5904.
[33] Horng, H. E.; Yang, S. Y.; Lee, S. L.; Hong, C. Y.; Yang, H. C. Appl. Phys. Lett. 2001, 79, 350.