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 {\mu}C/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.
@article{arxiv.2601.09092,
title = {Unexpected type-II multiferroic phase in GdMnO3 under high magnetic fields},
author = {Ming Yang and Jun Chen and Junfeng Wang and Chao Dong and Chengliang Lu and Gang Xu and Jinguang Cheng and Jianshi Zhou and Shuai Dong},
journal= {arXiv preprint arXiv:2601.09092},
year = {2026}
}