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- W4287021814 abstract "We present both static and time-resolved second harmonic generation (SHG) measurements on polar antiferromagnet Fe$_2$Mo$_3$O$_8$ to monitor the evolution of the electric polarization change and its coupling to magnetic order. We find that only one of the second order tensor elements, $chi_{ccc}^{(2)}$ ,shows a prominent change below the Neel temperature $T_N = 60$ K, indicating a magnetic order induced electric polarization change along the c-axis. Time-resolved SHG measurement reveals an ultrafast recovery of the second order tensor element upon the ultrashort laser excitation with fluence above 0.3 $mJ/cm^2$, yielding evidence for a photoinduced ultrafast phase transition from the AFM ordered state to the paramagnetic state. Our work will help understand the spin induced polarization and the ultrafast optical tuning effect in Fe$_{2}$Mo$_{3}$O$_{8}$." @default.
- W4287021814 created "2022-07-25" @default.
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- W4287021814 date "2021-08-23" @default.
- W4287021814 modified "2023-09-27" @default.
- W4287021814 title "Revealing magnetoelectric coupling effect in polar antiferromagnet Fe$_2$Mo$_3$O$_8$ by static and time resolved second harmonic generation" @default.
- W4287021814 hasPublicationYear "2021" @default.
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