Photoinduced switching between charge and orbital ordered insulator and ferromagnetic metal in perovskite manganites

M. Matsubara, Y. Okimoto, T. Ogasawara, S. Iwai, Y. Tomioka, H. Okamoto, and Y. Tokura
Phys. Rev. B 77, 094410 – Published 13 March 2008

Abstract

Photoinduced switching in perovskite manganites by irradiation of a femtosecond laser pulse was investigated on Pr0.55(Ca1ySry)0.45MnO3 locating in the critical region between the charge and orbital ordered insulator (CO/OOI) phase and the ferromagnetic metal (FM) phase. For a low excitation density, the charge and orbital order is partially melted and the microscopic quasi-FM domains are generated, which rapidly return to the CO/OOI state. When the excitation density exceeds a threshold, the CO/OOI phase transforms permanently to the FM one. The stabilization of the photoinduced FM state is attributable to the large relaxation of the lattice deformations through the percolation of the microscopic quasi-FM domains.

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  • Received 26 September 2007

DOI:https://doi.org/10.1103/PhysRevB.77.094410

©2008 American Physical Society

Authors & Affiliations

M. Matsubara1,*, Y. Okimoto1,†, T. Ogasawara1, S. Iwai1,‡, Y. Tomioka1, H. Okamoto1,2, and Y. Tokura1,3,4

  • 1Correlated Electron Research Center (CERC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8562, Japan
  • 2Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
  • 3Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
  • 4Multiferroics Project, ERATO, Japan Science and Technology Corporation, AIST Tsukuba Central 4, Tsukuba 305-8562, Japan

  • *m-matsubara@aist.go.jp
  • Present address: Department of Materials Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan.
  • Present address: Department of Physics, Tohoku University, Sendai 980-8578, Japan.

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Issue

Vol. 77, Iss. 9 — 1 March 2008

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