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Influence of switchable magnetic field on the modulation property of nanostructured magnetic fluids
Authors:Hongzhu Ji  Shengli Pu  Xiang Wang  Guojun Yu
Affiliation:1. Center for Atmospheric Sciences, Department of Atmospheric and Planetary Sciences, Hampton University, Hampton, VA 23668, USA;2. National Institute of Aerospace, Hampton, VA 23666-6147, USA;3. Optical Remote Sensing Laboratory, The City College of New York, New York 10031, USA;1. Section of Physics T&R, Department of Basic Sciences, Army Officer Academy, Hefei, Anhui, 230031, China;2. Postgraduate Company, Army Officer Academy, Hefei, Anhui, 230031, China;3. Key Laboratory of Polarization Imaging Detection Technology, Anhui Province, Hefei, Anhui, 230031, China;4. Key laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei, Anhui, 230031, China;5. University of Science and Technology of China, Hefei, Anhui, 230031, China;1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;2. Southwest China Institute of Electronic Equipments, China;1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Dongnanhu Road, 3888#, 130033, Changchun, PR China;2. University of Chinese Academy of Sciences, Yuquan Road, 19#A, 100049, Beijing, PR China;3. The Civil Aviation of China, Jinbei Road, 2898#, 300300, Tianjin, PR China;1. CONICET, LAFISO y Nanoproject, Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Avenida Independencia 1800, 4000 San Miguel de Tucumán, Argentina;2. Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5460, Corrientes, Argentina;3. Instituto de Física del Litoral de Santa Fe-CONICET-Universidad Nacional del Litoral, Güemes 3450, 3000, Santa Fe, Argentina
Abstract:Magnetic fluid is a kind of colloidal material with tunable microstructure and unique optical properties. The tunable magneto-optical modulation property of magnetic fluid under externally switchable magnetic field with various modulation periods is investigated theoretically and experimentally. The transitional modulation period (lower limit of the working frequency) between the square-like and oscillation-like modulation is achieved and found to be magnetic-field- and sample-concentration-dependent. The modulation mechanism is analyzed and ascribed to the dynamic microstructure of magnetic fluid under different modulation periods of external magnetic fields. The result of this work may be helpful for the pragmatic applications of magnetic fluid based on the square-like modulation.
Keywords:
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