Optical and magneto-optical properties of MnPt3 films (abstract)

Authors

Kurt W. Wierman, Seagate Corporation, Pittsburgh, PA
J. N. Hilfiker, University of Nebraska - Lincoln
Renat F. Sabiryanov, University of Nebraska - OmahaFollow
Sitaram Jaswal, University of NebraskaFollow
Roger D. Kirby, University of Nebraska-LincolnFollow
John A. Woollam, University of Nebraska-LincolnFollow

Date of this Version

April 1997

Comments

Published in Journal of Applied Physics, 81:8 (April 15, 1997), 5674. DOI: 10.1063/1.364692
Copyright © 1997 The American Institute of Physics. Used by permission.
Journal website = http://jap.aip.org/

Abstract

Optically thick films of MnPt₃ were prepared by magnetron sputtering onto quartz substrates. Postdeposition annealing at 850 °C resulted in highly textured (111) films with the L1₂ (Cu₃Au) structure. MnPt₃ films are ferromagnetic with a Curie temperature of 380 °C, and they show large magneto-optical effects in the visible. These films also show a high degree of long-range order. The diagonal components of the dielectric tensor were determined using variable angle spectroscopic ellipsometry measurements over the spectral range 1.2–2.4 eV. Magneto-optic Kerr rotation and ellipticity measurements were made at near normal incidence over the spectral range 1.4–3.6 eV to determine the off-diagonal components of the MnPt₃ dielectric tensor. First-principles electronic structure calculations were carried out for the ordered MnPt₃ structure, and from these the components of the dielectric tensor were calculated. We find excellent agreement between the measured and calculated diagonal components, but only fair agreement for the off-diagonal components