Magneto-Optical Properties of Sputtered Mn5Ge3 Films
- 15 March 1971
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 42 (4), 1706-1707
- https://doi.org/10.1063/1.1660402
Abstract
The Faraday rotation and optical absorption of ferromagnetic Mn5Ge3thin films have been measured in the visible and near infrared. Apart from a gradual rise in optical density in the near uv, the absorption is featureless to 2.5 μ. The Faraday rotation behaves similarly. At 500 mμ the room‐temperature absorption coefficient α and the 5°K saturation rotation F are 3.5×105 cm−1 and 2.1×105 deg/cm, respectively. The rotation decreases with rising temperature and vanishes at 40°C which agrees well with the bulk Curie temperature of 37°C. The in‐plane coercive field Hc decreases monotonically with temperature as Tc is approached. For a 900‐Å‐thick filmHc is 260 Oe at 0°C. The dependence of magnetic and magneto‐opticalproperties on filmstructure is discussed.Keywords
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