Quantum theory of femtosecond optomagnetic effects for rare-earth ions in DyFeO3

A. I. Popov, K. A. Zvezdin, Z. V. Gareeva, A. V. Kimel, and A. K. Zvezdin
Phys. Rev. B 103, 014423 – Published 15 January 2021

Abstract

Our theoretical analysis shows that a femtosecond laser pulse can efficiently launch magnetization dynamics of Dy3+ ions in DyFeO3 and DyAlO3. Excitation of electrons from the ground state to the low-lying electronic level of Dy3+ ions by circularly or linearly polarized light can be seen as a result of an effective magnetic field acting on the magnetic moments of the rare-earth ions. It is shown that the launched magnetization dynamics can be expressed as a combination of coherent oscillations of mutually parallel and mutually antiparallel magnetic moments of Dy3+ ions, respectively. While the antiparallel magnetic moments lie in the plane perpendicular to the wave vector of light in the medium k, the parallel magnetic moments are aligned along k. The magnetization dynamics depend strongly on the duration and the shape of the pumping laser pulse, as well as on the anisotropy in properties of the rare-earth ion.

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  • Received 11 April 2020
  • Revised 14 December 2020
  • Accepted 15 December 2020

DOI:https://doi.org/10.1103/PhysRevB.103.014423

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. I. Popov1,2, K. A. Zvezdin1,3, Z. V. Gareeva4,5, A. V. Kimel6, and A. K. Zvezdin3,7

  • 1Moscow Institute of Physics and Technology (State University), 141700 Dolgoprudny, Russia
  • 2National Research University of Electronic Technology, 124498 Zelenograd, Moscow, Russia
  • 3Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
  • 4Institute of Molecule and Crystal Physics, Subdivision of the Ufa Federal Research Center of the Russian Academy of Sciences, 450075 Ufa, Russia
  • 5Bashkir State University, 450000 Ufa, Russia
  • 6Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
  • 7P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia

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Issue

Vol. 103, Iss. 1 — 1 January 2021

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