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arXiv · 2601.09092

Unexpected type-II multiferroic phase in GdMnO3 under high magnetic fields

Ming Yang·Jun Chen·Junfeng Wang·Chao Dong·Chengliang Lu·Gang Xu·Jinguang Cheng·Jianshi Zhou·Shuai Dong
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Abstract

Perovskite manganites with small A-site ions, as the first and canonical branch of type-II multiferroics, are ideal systems to exhibit magnetism-induced ferroelectricity. Despite their established magnetoelectric phase diagrams under low magnetic fields, here an unidentified phase with a large magnetism-induced polarization (up to 1500 μC/m2) is revealed in GdMnO3 under high magnetic fields up to 60 T. Based on multiprobe experiments, a complete phase diagram is constructed with successive polar-nonpolar-polar-nonpolar transitions. Such a nonmonotonic evolution is well mimicked by model simulation, while the spin-lattice coupling is the key ingredient for the reentrant ferroelectric phase.

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Ming Yang, Jun Chen, Junfeng Wang, Chao Dong, Chengliang Lu, Gang Xu, Jinguang Cheng, Jianshi Zhou, Shuai Dong. 2026-01-14. Unexpected type-II multiferroic phase in GdMnO3 under high magnetic fields. https://arxiv.org/abs/2601.09092

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