All-optical probe of sub-THz spin precession in a L10 MnGa nanolayer

Shigemi Mizukami; Kazuya Z. Suzuki; Yoshio Miura

doi:10.7567/1882-0786/ab0c48

All-optical probe of sub-THz spin precession in a L1₀ MnGa nanolayer

Shigemi Mizukami, Kazuya Z. Suzuki, Yoshio Miura

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We measured an all-optical time-resolved magneto-optical Kerr effect for L1₀ MnGa ultrathin films fabricated with a low-temperature hetero-epitaxy technique. Spin precession was observed with a frequency over 0.1 THz due to a large perpendicular magnetic anisotropy (PMA) field of ∼3 T. The effective Gilbert damping constant α _eff was sensitive to the deposition temperature. A minimum value of α _eff of 0.017 was observed, which was about twice as large as that reported for much thicker films of MnGa with high chemical ordering but was comparable to those reported in other nanometer-thick PMA material films.

Original language	English
Article number	043003
Journal	Applied Physics Express
Volume	12
Issue number	4
DOIs	https://doi.org/10.7567/1882-0786/ab0c48
Publication status	Published - 2019 Apr 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "We measured an all-optical time-resolved magneto-optical Kerr effect for L10 MnGa ultrathin films fabricated with a low-temperature hetero-epitaxy technique. Spin precession was observed with a frequency over 0.1 THz due to a large perpendicular magnetic anisotropy (PMA) field of ∼3 T. The effective Gilbert damping constant α eff was sensitive to the deposition temperature. A minimum value of α eff of 0.017 was observed, which was about twice as large as that reported for much thicker films of MnGa with high chemical ordering but was comparable to those reported in other nanometer-thick PMA material films.",

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AU - Mizukami, Shigemi

AU - Suzuki, Kazuya Z.

AU - Miura, Yoshio

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Y1 - 2019/4/1

N2 - We measured an all-optical time-resolved magneto-optical Kerr effect for L10 MnGa ultrathin films fabricated with a low-temperature hetero-epitaxy technique. Spin precession was observed with a frequency over 0.1 THz due to a large perpendicular magnetic anisotropy (PMA) field of ∼3 T. The effective Gilbert damping constant α eff was sensitive to the deposition temperature. A minimum value of α eff of 0.017 was observed, which was about twice as large as that reported for much thicker films of MnGa with high chemical ordering but was comparable to those reported in other nanometer-thick PMA material films.

AB - We measured an all-optical time-resolved magneto-optical Kerr effect for L10 MnGa ultrathin films fabricated with a low-temperature hetero-epitaxy technique. Spin precession was observed with a frequency over 0.1 THz due to a large perpendicular magnetic anisotropy (PMA) field of ∼3 T. The effective Gilbert damping constant α eff was sensitive to the deposition temperature. A minimum value of α eff of 0.017 was observed, which was about twice as large as that reported for much thicker films of MnGa with high chemical ordering but was comparable to those reported in other nanometer-thick PMA material films.

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