Magneto-optical properties of a highly transparent cadmium ferrite-based magnetic fluid

The magneto-optical properties of a highly stable ionic magnetic fluid sample containing CdFe2O4 nanoparticles were investigated using static magnetic birefringence, zero-field optical transmissivity, and transmission electron microscopy. From our measurements we found that the transmittivity and the birefringence of the CdFe2O4-based sample is several times greater than a typical magnetic fluid sample (γ-Fe2O3 based), giving this magnetic material great potential for magneto-optics applications. We also found that the birefringence can be increased by several orders of magnitude, allowing full manipulation of the observed negative differential transmitted optical intensity feature.

[1]  P. Scholten,et al.  The origin of magnetic birefringence and dichroism in magnetic fluids , 1980 .

[2]  P. Morais,et al.  The influence of aggregates and relative permeability on the magnetic birefringence in ionic magnetic fluids , 2001 .

[3]  F. Monte,et al.  Faraday rotation in magnetic γ-Fe2O3/SiO2 nanocomposites , 1997 .

[4]  D. DiVincenzo,et al.  Quantum computation with quantum dots , 1997, cond-mat/9701055.

[5]  P. Morais,et al.  Zero-field birefringence in magnetic fluids: Temperature, particle size, and concentration dependence , 2000 .

[6]  N. Buske,et al.  Biocompatible magnetic core/shell nanoparticles , 2002 .

[7]  S. L. Lee,et al.  Magnetochromatics of the magnetic fluid film under a dynamic magnetic field , 2001 .

[8]  Shieh-Yueh Yang,et al.  Designing the refractive indices by using magnetic fluids , 2003 .

[9]  V. Garg,et al.  Synthesis and characterization of size-controlled cobalt-ferrite-based ionic ferrofluids , 2001 .

[10]  C. Ho,et al.  Magnetochromatics resulted from optical gratings of magnetic fluid films subjected to perpendicular magnetic fields , 2000 .

[11]  B. M. Berkovskiĭ,et al.  Magnetic Fluids and Applications Handbook , 1996 .

[12]  Andris F. Bakuzis,et al.  Particle sizing of magnetite-based magnetic fluid using atomic force microscopy: A comparative study with electron microscopy and birefringence , 2000 .

[13]  Tetsuya Sato,et al.  Magnetic properties of ultrafine particles and bulk material of cadmium ferrite , 1998 .

[14]  Shieh-Yueh Yang,et al.  Magnetically-modulated refractive index of magnetic fluid films , 2002 .