G. Bryan Street, Robert L. Bingham, et al.
Journal of the Chemical Society, Chemical Communications
The new compound manganese gallium germanide has recently been shown to be a uniaxial ferromagnet with a Curie temperature of 185°C. The easy axis of magnetization coincides with the tetragonal crystallographic c axis. Nearly completely c-axis-oriented films with hysteresis loops showing essentially 100% remanence normal to the film plane have been prepared by sputtering. The Curie temperature depends on the film composition. Curie temperatures as low as 110°C have been observed in nonstoichiometric films. These films have a room-temperature coercivity of 950 Oe compared to ≥2000 Oe for stoichiometric films. At a wavelength of 6328 Å the absorption coefficient α (corrected for reflectivity) is 5.8×105 cm-1 and the room-temperature polar Faraday rotation F is 80 000°/cm. The reflectivity R at normal incidence is 0.47. MnGaGe undergoes no phase changes before melting peritectically at 616°C and the films are stable to oxidation at temperatures well above the Curie point. The low Curie temperature combined with high remanence normal to the film plane make this material a potential candidate for magneto-optic file applications. © 1973 American Institute of Physics.
G. Bryan Street, Robert L. Bingham, et al.
Journal of the Chemical Society, Chemical Communications
Thomas C. Clarke, Mohamad T. Krounbi, et al.
Journal of the Chemical Society, Chemical Communications
E. Sawatzky, D.H. Horne
Review of Scientific Instruments
D.E. Horne, E. Sawatzky
Review of Scientific Instruments