期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 481, 期 1-2, 页码 851-854出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.03.131
关键词
Magnetically ordered materials; Optical properties; Microstructure
资金
- National Natural Science Foundation of China [10704048]
- Research Fund for Selecting and Training Excellent Young Teachers in Universities of Shanghai, Shanghai Municipal Education Commission [563804]
- Scientific Research Initiative Fund for the Doctorates in University of Shanghai for Science and Technology [X729]
The model of photonic crystals (PCs) formed in magnetic fluids under externally magnetic fields is established and the mechanisms of tunability are expounded. The magnetic-field-dependent structure ratio and refractive index contrast of the photonic crystals are derived from the experimental data about the structures and refractive indices for a MnFe2O4 magnetic fluid under externally magnetic fields. Band diagram calculations display the tunability of the forbidden bands with magnetic field strength for both TE and TM modes. Furthermore, the number of the forbidden bands for the TE mode increases with the magnetic field strength. (C) 2009 Elsevier B.V. All rights reserved.
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