Title :
Optical investigation of γ-Fe2O3 nanoparticle-doped silica gel matrix for birefringent components
Author :
Jamon, D. ; Robert, S. ; Donatini, F. ; Rousseau, J.J. ; Bovier, C. ; Roux, H. ; Serrughetti, J. ; Cabuil, V. ; Zins, D.
Author_Institution :
Univ. Jean Monnet, Saint-Etienne, France
fDate :
9/1/2001 12:00:00 AM
Abstract :
We present an optical study of silica gel matrix doped with maghemite γ-Fe2O3 nanoparticles originating from a ferrofluid. This work is a preliminary study for building adjusted birefringent components suitable for ellipsometry. Silica gel matrix is obtained as sol-gel synthesis. Results show that pure and doped samples solidified out of a magnetic field are quasi-isotropic, whereas samples solidified in the presence of a magnetic field exhibit a very large permanent linear birefringence comparable to that produced by the ferrofluid under the same magnetic field
Keywords :
birefringence; ellipsometry; gels; iron compounds; magnetic fluids; magneto-optical effects; nanostructured materials; silicon compounds; sol-gel processing; solidification; γ-Fe2O3 nanoparticle doped silica gel matrix; SiO2:Fe2O3; ellipsometry; maghemite ferrofluid; magnetic field; optical birefringence; sol-gel synthesis; solidification; Anisotropic magnetoresistance; Birefringence; Ellipsometry; Magnetic anisotropy; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetooptic effects; Perpendicular magnetic anisotropy; Silicon compounds;
Journal_Title :
Magnetics, IEEE Transactions on