Optical Control of the Magnetic Anisotropy of Ferromagnetic Bilayered Manganites

S. Tomimoto, M. Matsubara, T. Ogasawara, H. Okamoto, T. Kimura, and Y. Tokura
Phys. Rev. Lett. 98, 017402 – Published 5 January 2007

Abstract

Optical manipulation of the magnetic anisotropy is demonstrated for bilayered manganites, La22xSr1+2xMn2O7, by means of femtosecond Kerr-rotation measurements. Upon the photoexcitation on the x=0.32 crystal, the magnetization exhibits the precessional motion for about 1 ns, revealing the directional change of the magnetocrystalline anisotropy from the c axis to the ab plane. This change of the anisotropy induces the nonthermal decrease of the c-axis magnetization component for about 1 ns.

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  • Received 25 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.017402

©2007 American Physical Society

Authors & Affiliations

S. Tomimoto1, M. Matsubara1, T. Ogasawara1, H. Okamoto1,2, T. Kimura3,*, 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, Kashiwa 277-8561, Japan
  • 3Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
  • 4Spin Superstructure Project (SSS), ERATO, Japan Science and Technology Corporation (JST), Tsukuba 305-0046, Japan

  • *Present address: Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA.

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Vol. 98, Iss. 1 — 5 January 2007

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