Magnetization-induced Second-Harmonic Generation in Magnetic Semiconductor (Ga,Mn)As

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  • Ogawa Yoshihiro
    Spin Superstructure Project, ERATO, Japan Science and Technology Agency (JST), National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 4
  • Akinaga Hiroyuki
    Research Consortium for Synthetic Nano-Function Materials Project (SYNAF), AIST
  • Takano Fumiyoshi
    Research Consortium for Synthetic Nano-Function Materials Project (SYNAF), AIST
  • Arima Takahisa
    Spin Superstructure Project, ERATO, Japan Science and Technology Agency (JST), National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 4 Institute of Materials Science, University of Tsukuba
  • Tokura Yoshinori
    Spin Superstructure Project, ERATO, Japan Science and Technology Agency (JST), National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 4 Correlated Electron Research Center (CERC), AIST, AIST Tsukuba Central 4 Department of Applied Physics, University of Tokyo

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Abstract

The second-harmonic generation (SHG) induced by spontaneous magnetization has been investigated for the magnetic semiconductor (Ga,Mn)As. The magnetization-induced SHG (MSHG) signal with an intensity comparable to that of the SHG signal of α-quartz and the resultant nonlinear Kerr rotation have been observed below the ferromagnetic transition temperature. The magnetization curve was obtained using a large rotation angle. The spectrum of the MSHG signal indicates that the signal is two-photon-resonant with the E1 interband transition and one-photon-resonant with the intra-atomic d–d transition of Mn2+.

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