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Ultrafast polarization and magnetization response of multiferroic GaFeO3 using time-resolved nonlinear optical techniques

Masakazu Matsubara, Yoshio Kaneko, Jin-Ping He, Hiroshi Okamoto, and Yoshinori Tokura
Phys. Rev. B 79, 140411(R) – Published 29 April 2009

Abstract

We have investigated the ultrafast electric and magnetic response of multiferroic GaFeO3 induced by irradiation of a femtosecond laser pulse. By using the polarization selection rules of crystallographic and magnetic second-harmonic generation, the dynamics of electric polarization P and toroidal moment T were simultaneously and separately detected on a femtosecond time scale. The magnetization dynamics was derived by comparing the dynamics of P and T. We demonstrate the availability of time-resolved nonlinear optical techniques for the dynamical probe of multiple degrees of freedom in multiferroics.

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  • Received 20 February 2009

DOI:https://doi.org/10.1103/PhysRevB.79.140411

©2009 American Physical Society

Authors & Affiliations

Masakazu Matsubara1,2, Yoshio Kaneko3, Jin-Ping He3, Hiroshi Okamoto1,2,4, and Yoshinori Tokura1,3,5

  • 1National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8562, Japan
  • 2CREST, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
  • 3Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), ASI, RIKEN, Wako 351-0198, Japan
  • 4Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
  • 5Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan

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Issue

Vol. 79, Iss. 14 — 1 April 2009

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