Title :
Origin of strong intrinsic Kerr effect in FePt and FePd ordered compounds
Author :
Armelles, G. ; Weller, D. ; Rellinghaus, B. ; Farrow, R.F.C. ; Toney, M.F. ; Caro, P. ; Cebollada, A. ; Alonso, M.I.
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
The magneto-optical spectra of chemically ordered FePt (001) and FePd (001) compounds are studied. The imaginary part of the off diagonal element, σ2xy, of the conductivity tensor has two peaks located in the energy ranges 1.2-2 eV (Fe-like transitions) and 4-4.5 eV (Pt or Pd like transitions). The strength of these peaks is larger in FePt than in FePd and roughly scales with the spin orbit coupling of Pt and Pd d-bands in the ultraviolet spectral range. Large differences in the Fe dominated low energy side of the spectra suggest a much higher degree of electronic hybridization in FePt than in FePd
Keywords :
Kerr magneto-optical effect; ferromagnetic materials; iron alloys; long-range order; magnetic epitaxial layers; metallic epitaxial layers; palladium alloys; platinum alloys; spin-orbit interactions; ultraviolet spectra; 1.2 to 2 eV; 4 to 4.5 eV; Fe-like transitions; FePd; FePd ordered compounds; FePt; FePt ordered compounds; Pd like transitions; Pt like transitions; chemically ordered FePd (001); chemically ordered FePt (001); conductivity tensor; d-bands; electronic hybridization; energy ranges; imaginary part; long range chemical order; magneto-optical spectra; off diagonal element; spin orbit coupling; strong intrinsic Kerr effect; ultraviolet spectral range; Chemical compounds; Chemical elements; Chemicals; Conductivity; Electromagnetic wave absorption; Iron; Kerr effect; Magnetic field measurement; Magnetization; Magnetooptic effects; Optical films; Spectroscopy; Substrates; Temperature; Tensile stress;
Journal_Title :
Magnetics, IEEE Transactions on
