Determination of the Infrared Complex Magnetoconductivity Tensor in Itinerant Ferromagnets from Faraday and Kerr Measurements
- University of Buffalo, The State University of New York
- University of Tokyo, Tokyo, Japan
- ORNL
- Lawrence Berkeley National Laboratory (LBNL)
- University of California, Berkeley
- University of California, Santa Cruz
We present measurement and analysis techniques that allow the complete complex magnetoconductivity tensor to be determined from mid-infrared (11-1.6 {micro}m; 100-800 meV) measurements of the complex Faraday ({theta}{sub F}) and Kerr ({theta}{sub K}) angles. Since this approach involves measurement of the geometry (orientation axis and ellipticity of the polarization) of transmitted and reflected light, no absolute transmittance or reflectance measurements are required. Thick-film transmission and reflection equations are used to convert the complex {theta}{sub F} and {theta}{sub K} into the complex longitudinal conductivity {sigma}{sub xx} and the complex transverse (Hall) conductivity {sigma}{sub xy}. {theta}{sub F} and {theta}{sub K} are measured in a Ga{sub 1-x}Mn{sub x}As and SrRuO{sub 3} films. The resulting {sigma}{sub xx} is compared to the values obtained from conventional transmittance and reflectance measurements, as well as the results from Kramers-Kronig analysis of reflectance measurements on similar films.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 931989
- Journal Information:
- Physical Review B, Vol. 75, Issue 21
- Country of Publication:
- United States
- Language:
- English
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