F. Donatini et al., MEASUREMENTS OF LONGITUDINAL MAGNETOOPTIC EFFECTS IN FERROFLUIDS - A DYNAMIC METHOD, Journal of magnetism and magnetic materials, 162(1), 1996, pp. 69-74
We present an original method to study the circular birefringence (CB)
and circular dichroism (CD) of magnetic liquid materials placed in lo
w sinusoidal magnetic fields. CB and CD are measured simultaneously us
ing the same apparatus. Many results obtained with the ferrofluid Fe2C
oO4 in dibutylphthalate (DBP) are reported and discussed: 'Faraday rot
ation' and 'Faraday ellipticity' versus magnetic field amplitude, magn
etic field frequency, volume concentration. CB and CD are non-reciproc
al effects. This property is involved in this new dynamic method.