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Updated: Sep 17, 2025

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Colossal Room-Temperature Magnetoelectric Coupling in Anion-Deficient Layered Perovskite Films with Ordered Cation
Hongwei Wang1,2, Xiangfei Li3, Jun Miao1,2
1Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, China.
Abstract:
The anion-deficient layered perovskite Pb2Fe2O5, featuring a polarizable active Pb cation with lone pair electrons and a magnetically active transition metal Fe cation, presents a promising candidate for multiferroic applications. Nonetheless, the exploration of multiferroic properties and magnetoelectric coupling in Pb2Fe2O5 is extremely rare due to its complex structure. Herein, a colossal magnetoelectric coupling coefficient (5.19 × 105 mV cm-1 Oe-1), high ferroelectric polarization (2 μC/cm2), and magnetic moment (25 emu/cc) at room temperature have been discovered in an epitaxial Pb2+0.48Fe2O5 film. The findings of this study demonstrate that the introduction of excessive Pb ions can disrupt the disordered arrangement of the mixed layer and convert it to an ordered distribution to improve ferroelectric properties. This research not only enriches the magnetoelectric coupling material system but also offers a viable strategy for achieving strong room-temperature magnetoelectric coupling and multiferroicity in layered oxide materials.
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