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Phys. Rev. B 75, 214416 (2007) [11 pages]

Determination of the infrared complex magnetoconductivity tensor in itinerant ferromagnets from Faraday and Kerr measurements

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M.-H. Kim1, G. Acbas1, M.-H. Yang1, I. Ohkubo2, H. Christen3, D. Mandrus3, M. A. Scarpulla4, O. D. Dubon4, Z. Schlesinger5, P. Khalifah6, and J. Cerne1
1Department of Physics, University at Buffalo, SUNY, Buffalo, New York 14260, USA
2Department of Applied Chemistry, University of Tokyo, Tokyo, 113–8656, Japan
3Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge, Tennessee 37831, USA
4Department of Materials Science and Engineering and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA
5Department of Physics, University of California, Santa Cruz, California 95064, USA
6Department of Chemistry, University of Massachussetts, Amherst, Massachusetts 01003, USA

See Also: Publisher's Note

Received 8 January 2007; published 13 June 2007; corrected 14 September 2007

We present measurement and analysis techniques that allow the complete complex magnetoconductivity tensor to be determined from midinfrared (11–1.6 μm; 100–800 meV) measurements of the complex Faraday (θF) and Kerr (θK) 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 θF and θK into the complex longitudinal conductivity σxx and the complex transverse (Hall) conductivity σxy. θF and θK are measured in a Ga1−xMnxAs and SrRuO3 films. The resulting σxx 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.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.214416
DOI:
10.1103/PhysRevB.75.214416
PACS:
78.20.Ls, 78.20.Ci, 75.50.Pp, 78.66.Bz

See Also

Publisher's Note: M.-H. Kim, G. Acbas, M.-H. Yang, I. Ohkubo, H. Christen, D. Mandrus, M. A. Scarpulla, O. D. Dubon, Z. Schlesinger, P. Khalifah, and J. Cerne, Publisher's Note: Determination of the infrared complex magnetoconductivity tensor in itinerant ferromagnets from Faraday and Kerr measurements [Phys. Rev. B 75, 214416 (2007)], Phys. Rev. B 76, 149901 (2007).

 
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