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

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3220

Lastpage

3222

Abstract

The magneto-optical spectra of chemically ordered FePt (001) and FePd (001) compounds are studied. The imaginary part of the off diagonal element, σ_2xy, 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617897

Filename

617897