Influence of switchable magnetic field on the modulation property of nanostructured magnetic fluids

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...

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Bibliographic Details
Published in:Optics communications 2012-10, Vol.285 (21-22), p.4435-4440
Main Authors: Ji, Hongzhu, Pu, Shengli, Wang, Xiang, Yu, Guojun
Format: Article
Language:English
Subjects:
Dynamic tests
Magnetic fields
Magnetic fluid
Magnetic fluids
Magnetic properties
Microstructure
Modulation
Nanostructure
Optical properties
Oscillation-like modulation
Square-like modulation
Transitional modulation period of magnetic field
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Summary: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.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2012.07.053