MAGNETOOPTICAL SPECTRA OF (WN(1-X)FE(X))PT-3 ORDERED ALLOY-FILMS

The magnetic and magneto-optical properties have been investigated for ordered (Mn1-xFex)Pt-3 alloy (0 < x < 0.6) films, prepared by anneali ng (Mn-Fe)/Pt multilayer films at 800 degrees C. The Kerr spectrum of the MnPt3 film had a large negative peak value of -1.18 degrees at 1.2 4 eV, and showed a small positive peak around 3.2 eV. With increasing Fe content x, the peak value at 1.24 eV decreased in magnitude and the position of the peak shifted towards lower energy side. Furthermore, another peak appeared in the Kerr spectra around 2.3 eV for x > 0.24. The spectral analysis of the diagonal component of dielectric tensor a nd the off-diagonal component of conductivity tensor showed that all t he peaks mentioned above were attributed to interband transitions. (C) 1997 American Institute of Physics.