Volume 95, Number 1, July 2011
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||14 June 2011|
Terahertz Faraday rotation induced by an anomalous Hall effect in the itinerant ferromagnet SrRuO3
Multiferroics Project, ERATO, Japan Science and Technology Agency (JST) - Tokyo 113-8656, Japan
2 Department of Physics, University of Tokyo - Tokyo 113-0033, Japan
3 Cross-correlated Research Group(CMRG) and Correlated Electron Research Group(CERG), Advanced Science Institute, RIKEN - Wako 351-0198, Japan
4 WPI Advanced Institute for Materials Research and Institute for Materials Research, Tohoku University Sendai 980-8577, Japan
5 Department of Applied Physics, University of Tokyo - Tokyo 113-8656, Japan
Accepted: 11 May 2011
We report on the observation of Faraday rotation in the terahertz frequency range in a thin film of itinerant ferromagnet, SrRuO3. As optical counterpart of the anomalous Hall effect (AHE), the complex optical Hall conductivity spectrum σxy(ω) was extracted from the Faraday rotation and ellipticity spectrum. The temperature and frequency (ω) dependences of σxy(ω) in the terahertz regime are consistently connected with the dc AHE. A clear resonance structure is identified in the σxy(ω) spectrum right below the Fermi level as the plausible origin of the large dc AHE.
PACS: 78.20.Ls – Magneto-optical effects / 75.47.-m – Magnetotransport phenomena; materials for magnetotransport / 75.70.Ak – Magnetic properties of monolayers and thin films
© EPLA, 2011
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