Determination of the infrared complex magneto-conductivity tensor in itinerant ferromagnets from Faraday and Kerr measurements

Abstract

We present measurement and analysis techniques that allow the complete complex magneto-conductivity tensor to be determined from mid-infrared (11-1.6 micron; 100-800 meV) measurements of the complex Faraday (theta_F) and Kerr (theta_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_F and theta_K into the complex longitudinal conductivity sigma_xx and the complex transverse (Hall) conductivity sigma_xy. theta_F and theta_K are measured in a Ga_(1-x)Mn_xAs and SrRuO_3 films. The resulting sigma_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.

LaTeX file 25 pages, 7 figures

References in corpus (10)

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• Non-Fermi liquid behavior of SrRuO_3 -- evidence from infrared conductivity
• Impurity Band Conduction in a High Temperature Ferromagnetic Semiconductor
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• Testing the Berry phase model for extraordinary Hall effect in SrRuO3
• Infrared magneto-optical properties of (III,Mn)V ferromagetic semiconductors
• Infrared Hall effect in high Tc superconductors: Evidence for non-Fermi liquid Hall scattering
• Optical properties of metallic (III,Mn)V ferromagnetic semiconductors in the infrared to visible range
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• Mid-infrared Hall effect in thin-film metals: Probing the Fermi surface anisotropy in Au and Cu

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• Frequency-independent terahertz anomalous Hall effect in DyCo${}_5$, Co${}_{32}$Fe${}_{68}$ and Gd${}_{27}$Fe${}_{73}$ thin films from DC to 40 THz
• Terahertz Magneto Optical Polarization Modulation Spectroscopy
• Electronic structure of ferromagnetic semiconductor Ga1-xMnxAs probed by sub-gap magneto-optical spectroscopy
• High Precision Magnetic Linear Dichroism Measurements in (Ga,Mn)As
• Infrared anomalous Hall effect in SrRuO${}_3$: Evidence for crossover to intrinsic behavior
• Terahertz radiation-induced conductivity, Kerr and Faraday angles, and spin textures in a two-dimensional electron gas with spin-orbit coupling subjected to a high magnetic field and periodic potential
• Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate
• Giant anomalous Hall and Nernst effect in magnetic cubic Heusler compounds
• Electric-Field-induced Two-Dimensional Fully Compensated Ferrimagnetism and Emergent Transport Phenomena