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Experimental layout for studying the suppression of thermal lens effect in a magnetic fluid by applying an external parallel magnetic field. The strength of the magnetic field is adjusted by tuning the magnitude of the supply current. The transmitted light powers at different field strengths are measured by a power meter.
Typical quasisteady diffraction patterns at different applied magnetic field strengths: (a) 0, (b) 31.0, (c) 46.5, and (d) .
Divergence angle as a function of applied magnetic field . The inset shows the relationship between the magnetic field strength and the applied current .
Optical transmission as a function of magnetic field.
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