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Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 66: Poster 3

MA 66.24: Poster

Friday, March 24, 2017, 09:30–13:00, P2-OG2

Ultrafast Magnetization Dynamics in [FePt]1−χ Mnχ — •Cinja Seick1, Ute Bierbrauer2, Nataliia Safonova3, Benjamin Stadtmüller2, Manfred Albrecht3, Martin Aeschlimann2, Daniel Steil1, and Stefan Mathias11I. Physikalisches Institut, Universität Göttingen, Germany — 2Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Germany — 3Institute of Physics, University of Augsburg, Germany

We study the magnetization dynamics of [FePt]1−χ Mnχ in order to investigate the influence of adding Mn to the ferromagnetic compound FePt, which is relevant for technological applications(1) and basic research(2). In our TR-MOKE studies on [FePt]1−χ Mnχ, we found a drastic decrease of the demagnetization time in comparison to pure FePt(3). Furthermore, we compare fluence-dependent measurements of the system to the predictions of the M3TM and find a sudden decrease in the demagnetization time at medium demagnetization strength, which is not present for pure FePt. This two differences seem to be caused by the added Mn.
References:
(1) D. Weller et al., Annu. Rev. Mater. Sci. 30, 611-644 (2000)
(2) C-H. Lambert et all., Science 345, 1337-1340 (2014)
(3) S. Iihama et al., J. Phys. D: Appl. Phys. 49, 035002 (2016)

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