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Terahertz magnetic circular dichroism induced by exchange resonance in CoCr2O4 single crystal.

Journal Article


Abstract


  • Terahertz (THz) time domain spectroscopy (THz-TDS) of a CoCr₂O₄ single crystal has been performed under magnetic fields up to 8 Tesla. The magnetic field dependences of inter-sublattice exchange resonance at different temperatures have been investigated. Benefiting from the phase and polarization sensitive detection technique in THz-TDS, the circular absorption dichroism and Faraday ellipticity in the THz frequency region are observed and are found to be tunable by the external magnetic field. The complex indices of refraction are obtained under different magnetic field, which present distinct rotatory dispersions arising from the exchange magnetic resonance.

Publication Date


  • 2015

Citation


  • Zhang, P., Su, F., Zhang, S., Mei, H., Zhang, C., Luo, X., . . . Pi, L. (2015). Terahertz magnetic circular dichroism induced by exchange resonance in CoCr2O4 single crystal.. Optics express, 23(14), 17805-17814. doi:10.1364/oe.23.017805

Web Of Science Accession Number


Start Page


  • 17805

End Page


  • 17814

Volume


  • 23

Issue


  • 14

Abstract


  • Terahertz (THz) time domain spectroscopy (THz-TDS) of a CoCr₂O₄ single crystal has been performed under magnetic fields up to 8 Tesla. The magnetic field dependences of inter-sublattice exchange resonance at different temperatures have been investigated. Benefiting from the phase and polarization sensitive detection technique in THz-TDS, the circular absorption dichroism and Faraday ellipticity in the THz frequency region are observed and are found to be tunable by the external magnetic field. The complex indices of refraction are obtained under different magnetic field, which present distinct rotatory dispersions arising from the exchange magnetic resonance.

Publication Date


  • 2015

Citation


  • Zhang, P., Su, F., Zhang, S., Mei, H., Zhang, C., Luo, X., . . . Pi, L. (2015). Terahertz magnetic circular dichroism induced by exchange resonance in CoCr2O4 single crystal.. Optics express, 23(14), 17805-17814. doi:10.1364/oe.23.017805

Web Of Science Accession Number


Start Page


  • 17805

End Page


  • 17814

Volume


  • 23

Issue


  • 14