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- W3182249034 abstract "Recently, ferromagnetic/nonmagnetic heavy metal heterostructures have been intensively investigated as terahertz (THz) emitters. The interconversion of spin-to-charge dynamics plays a central role for efficient emission of THz electromagnetic pulses. However, a direct observation of spin–charge interconversion in antiferromagnetic (AFM) materials occurring on the sub-picosecond time scale remains a challenge. Herein, the magnetic-field-, pump-fluence-, and polarization-dependent THz emission behaviors by a femtosecond optical pump in cobalt (Co)/Mn2Au nanometer heterostructure are experimentally investigated. The Co/Mn2Au bilayer generates sizable THz signals, whereas the Mn2Au/Pt bilayer does not show any THz emission. In addition, the thickness- and temperature-dependent THz emission measurements indicate a direct relation between the THz amplitude and the conductivity of AFM Mn2Au layer. The results obtained will not only promote the fundamental understanding of ultrafast spin–charge interconversion in Co/Mn2Au heterostructures, but also provide a possibility of spectroscopic-based spin current detector at THz-frequency range." @default.
- W3182249034 created "2021-07-19" @default.
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- W3182249034 date "2021-08-02" @default.
- W3182249034 modified "2023-10-15" @default.
- W3182249034 title "Temperature‐Dependent Terahertz Emission from Co/Mn <sub>2</sub> Au Spintronic Bilayers" @default.
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- W3182249034 doi "https://doi.org/10.1002/pssr.202100290" @default.
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