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The role of magnetization compensation point for efficient ultrafast control of magnetization in Gd 24 Fe 66.5 Co 9.5 alloy

Author

Listed:
  • Rajasekhar Medapalli
  • Ilya Razdolski
  • Matteo Savoini
  • Ali Reza Khorsand
  • Alexandra Kalashnikova
  • Arata Tsukamoto
  • Akiyoshi Itoh
  • Andrei Kirilyuk
  • Alexey Kimel
  • Theo Rasing

Abstract

The ability of a femtosecond laser pulse to manipulate and reverse the magnetization in a ferrimagnetic Gd 24 Fe 66.5 Co 9.5 thin film was studied experimentally as a function of temperature. For a fixed energy of the laser pulse, the dynamics of magnetization showed different behavior depending on whether the sample temperature was below or above the magnetization compensation point (T M ). The conditions for full ultrafast demagnetization and magnetization reversal were easily achieved below T M , while the same laser excitation caused just 50% demagnetization above T M . This interesting change in magnetization dynamics is qualitatively explained in terms of effective changes in the magnitudes of magnetizations of atomic sublattices. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • Rajasekhar Medapalli & Ilya Razdolski & Matteo Savoini & Ali Reza Khorsand & Alexandra Kalashnikova & Arata Tsukamoto & Akiyoshi Itoh & Andrei Kirilyuk & Alexey Kimel & Theo Rasing, 2013. "The role of magnetization compensation point for efficient ultrafast control of magnetization in Gd 24 Fe 66.5 Co 9.5 alloy," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(4), pages 1-4, April.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:4:p:1-4:10.1140/epjb/e2013-30682-6
    DOI: 10.1140/epjb/e2013-30682-6
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