Liquid-matter relaxor ferroelectrics by design

Xinxin Zhang, Yu Zou, Minghui Deng, Xiang Huang, Fan Ye, Xiujuan Liu, Erxiang Xu, Yang Shen, Satoshi Aya () and Mingjun Huang ()
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Xinxin Zhang: South China University of Technology
Yu Zou: South China University of Technology
Minghui Deng: South China University of Technology
Xiang Huang: South China University of Technology
Fan Ye: South China University of Technology
Xiujuan Liu: South China University of Technology
Erxiang Xu: Tsinghua University
Yang Shen: Tsinghua University
Satoshi Aya: South China University of Technology
Mingjun Huang: South China University of Technology

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Knowing that traditional relaxor ferroelectrics stem from crystalline materials, one may ask whether they stabilize the liquid-matter analogy. The perspective is challenging and may enable a generic design of fluidic and flexible relaxor ferroelectrics. Here, we unveil a novel polar matter state, dubbed the nematic relaxor ferroelectric, by artificially introducing polar nanoregions with nematicity into a dielectric nematic environment. We observe clear signatures of a nematic relaxor, which exhibits a high field-induced polarization of 1.1 μC·cm−2 at 5 V·μm−1, over a wide temperature range (>30 K). The relaxor demonstrates two regimes: (1) stable relaxor against high electric fields (> 5 V·μm−1) at high temperatures over a 30 K range; (2) relaxor with a field-induced transition to a ferroelectric state at low temperatures. Based on the Landau-Ginzburg-Devonshire theory, we reconstruct free-energy landscapes from the electric field vs polarization curves. We observe a continuous transformation of energy landscapes from a double-well shape to a single-well shape, characterized by a broadening of the energy bottom, corresponding to a shift from nematic ferroelectrics to nematic relaxors with significant polarization fluctuations.

Date: 2025
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DOI: 10.1038/s41467-025-64421-y

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