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

Bakuzis, A.F.; Neto, K. Skeff; Gravina, P.P.; Figueiredo, L.C.; Morais, P.C.; Silva, L.P.; Azevedo, R.B.; Silva, O.
March 2004
Applied Physics Letters;3/29/2004, Vol. 84 Issue 13, p2355
Academic Journal
The magneto-optical properties of a highly stable ionic magnetic fluid sample containing CdFe[sub 2]O[sub 4] 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 CdFe[sub 2]O[sub 4]-based sample is several times greater than a typical magnetic fluid sample (γ-Fe[sub 2]O[sub 3] 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. © 2004 American Institute of Physics.


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