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Updated: Jan 8, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Molecular Ferroelectric Exhibiting a 10-Fold Enhancement in Second Harmonic Generation over KDP
Yaozhen Wu1, Panyun Song1, Xunpeng Li1
1School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
None:
Second-order nonlinear optical (NLO) switches are highly promising for next-generation intelligent optoelectronic devices. Herein, a zero-dimensional organic-inorganic hybrid ferroelectric, [Me3NEt][FeCl4] (1), was designed and synthesized via a quasi-spherical molecular strategy. Concurrent endothermic/exothermic peaks in differential scanning calorimetry (DSC) and step-like dielectric anomalies jointly corroborate the fully reversible structural transition. Strikingly, it exhibits a strong second-order NLO response with a second harmonic generation (SHG) intensity approximately 10 times greater than that of the benchmark KDP (KH2PO4). Its ferroelectric properties were further confirmed through piezoresistive force microscopy (PFM) observations and polarization-electric field (P-E) hysteresis loop testing. This study not only presents a high-performance NLO switch but also offers a viable design strategy for advanced ferroelectric and photonic materials.
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