Title :
Magnetic birefringence in copper and zinc ferrite-based ionic magnetic fluids
Author :
Pereira, A.R. ; Gonçalves, G. R R ; Bakuzis, A.F. ; Morais, P.C. ; Azevedo, R.B. ; Neto, K.Skeff
Author_Institution :
Inst. de Fisica, Brasilia Univ., Brazil
fDate :
7/1/2001 12:00:00 AM
Abstract :
The static magnetic birefringence (SMB) of copper and zinc ferrite ionic magnetic fluids (IMFs) were investigated within the oscillating dipole-interaction anisotropy concept. The model was extended to include the magnetic texture of the contributing particle agglomerates and the field dependence of the magnetic permeability. The SMB data of samples containing particle concentration in the range of 1×1016 to 5×1016 particle/cm3 were successfully described
Keywords :
birefringence; copper compounds; ferrites; magnetic anisotropy; magnetic fluids; magnetic permeability; magneto-optical effects; zinc compounds; CuFe2O4; ZnFe2O4; copper ferrite; ionic magnetic fluid; magnetic field dependence; magnetic permeability; magnetic texture; oscillating dipole interaction anisotropy; particle agglomerate; particle concentration; static magnetic birefringence; zinc ferrite; Anisotropic magnetoresistance; Atomic force microscopy; Birefringence; Copper; Magnetic anisotropy; Magnetic liquids; Nanoparticles; Permeability; Perpendicular magnetic anisotropy; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
