Ultrafast Magnetization Dynamics in Epitaxial Ni-Mn-Sn Heusler Alloy Film

• Authors: A. Bonda , S. Uba , K. Załęski , J. Dubowik , L. Uba
• Languages of publication: EN

Abstracts

EN

The work is devoted to studies of ultrafast magnetization dynamics induced by femtosecond laser pulses in ferromagnetic Ni-Mn-Sn shape memory Heusler alloy. We studied epitaxial thin Ni_{54.3}Mn_{31.9}Sn_{13.8} film deposited on (001) MgO substrate. Spin precession in an external magnetic field was triggered and detected by the time-resolved magneto-optical Kerr effect (TRMOKE) using pump-probe technique in dual color scheme experiment. Measurements were performed as a function of magnetic field H and pulse power P. The measured TRMOKE signal is composed of oscillatory and background components, both decaying exponentially in a nanosecond time scale. The precession frequency was determined and found to be varying in the range of 1-10 GHz with H up to 3 kOe and decreasing linearly with P. The dependence of Gilbert damping parameter α on H was determined and discussed.

Keywords

EN

75.78.Jp; 75.50.-y; 78.47.J-; 75.30.-m; 06.60.Jn; 75.40.Gb

Discipline

• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)
• 75.40.Gb: Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.)
• 75.50.-y: Studies of specific magnetic materials
• 75.78.Jp: Ultrafast magnetization dynamics and switching(for switching phenomena in ferroelectrics, see 77.80.Fm; for ultrafast spectroscopy, see 78.47.J-; for ultrafast processes in optics, see 42.65.Re)
• 78.47.J-: Ultrafast spectroscopy (<1>(see also 42.65.Re Ultrafast processes; optical pulse generation and pulse compression; 82.53.Mj Femtosecond probing of semiconductor nanostructures)
• 06.60.Jn: High-speed techniques (microsecond to femtosecond)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 501-504

Dates

published

2018-03

Contributors

author

A. Bonda

• Faculty of Mathematics and Informatics, University of Białystok, K. Ciołkowskiego 1M, 15-245 Białystok, Poland

author

S. Uba

• Faculty of Mathematics and Informatics, University of Białystok, K. Ciołkowskiego 1M, 15-245 Białystok, Poland

author

K. Załęski

• NanoBioMedical Centre, AMU, Umultowska 85, 61-614 Poznań, Poland

author

J. Dubowik

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

L. Uba

• Faculty of Mathematics and Informatics, University of Białystok, K. Ciołkowskiego 1M, 15-245 Białystok, Poland

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Identifiers

DOI

10.12693/APhysPolA.133.501