2024/05/10 by Hongwu Yu, Y. Fukada, Yu, H. +13 · 1 citation
Engineering · Materials Science · #FOS: Physical sciences #Magnetic Properties and Synthesis of Ferrites #Magneto-Optical Properties and Applications #Materials Science (cond-mat.mtrl-sci) #Multiferroics and related materials
paper · pdf · doi:10.48550/arxiv.2405.06243
openalex publication_date 2024/05/10 · openalex created_date 2024/05/14 · openalex updated_date 2026/07/28
Femtosecond time-resolved second harmonic generation (SHG) measurements were performed at room temperature on a single crystal of LuFe2O4, which has recently attracted attention as an electronic ferroelectric material in which polarization occurs due to the real-space arrangement of Fe2+ and Fe3+. We irradiated the crystal with 800 nm laser pulses, traced the subsequent SHG changes, and observed anisotropic polarization dynamics: immediately after photoexcitation, the in-plane (ab-plane) component of the SHG greatly reduced, while the inter-plane (c-axis) SHG increased. This means that a hidden photoexcited state, in which the in-plane charge ordering is broken but the polarization along c-axis direction enhanced, has been created by photoexcitation, indicating that the electronic ferroelectricity can be controlled on a femtosecond scale.