Title :
Comparison of the magnetorefractive effect in transmission and reflection for giant magnetoresistive Co-Ag thin films
Author :
Bozec, D. ; Canet, Fanny ; Kravets, V.G. ; Thompson, S.M. ; Matthew, J.A.D.
Author_Institution :
Dept. of Phys., York Univ., UK
Abstract :
Summary form only given. The magnetorefractive effect (MRE) measures a change of the dielectric function in the infrared region due to the change in conductivity when a magnetic field is applied to a giant magnetoresistive material. An experimental and theoretical study of the MRE has been performed in reflection and transmission for Co/sub x/Ag/sub 1-x/ granular films on Si[111] substrates. The maximum GMR of 7% was obtained for composition x=0.25. Fourier transform infrared spectroscopy was used to measure the change of reflection and transmission for s- and p-polarisation over a wavelength range from 2 to 25 /spl mu/m in an applied magnetic field up to 15 kOe. Spin dependence was introduced by calculating the optical conductivity using the Zhang and Levy model for GMR in granular materials.
Keywords :
Fourier transform spectra; cobalt alloys; dielectric function; discontinuous metallic thin films; giant magnetoresistance; infrared spectra; magneto-optical effects; optical conductivity; silver alloys; 2 to 25 micron; Co/sub x/Ag/sub 1-x/; FTIR reflection; FTIR transmission; Fourier transform infrared spectra; GMR; Si; Si[111] substrate; Zhang and Levy model; dielectric function; giant magnetoresistive material; granular films; magnetorefractive effect; optical conductivity; Conducting materials; Conductivity measurement; Dielectric measurements; Dielectric thin films; Giant magnetoresistance; Magnetic field measurement; Magnetic materials; Optical films; Optical reflection; Transistors;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001243
