The crystal and magnetic structures of single-crystalline hexagonal LuFeO3 films have been studied using x-ray, electron and neutron diffraction methods. The polar structure of these films are found to persist up to 1050 K; and the switchability of the polar behavior is observed at room temperature, indicating ferroelectricity. An antiferromagnetic order was shown to occur below 440 K, followed by a spin reorientation resulting in a weak ferromagnetic order below 130 K. This observation of coexisting multiple ferroic orders demonstrates that hexagonal LuFeO3 films are room-temperature multiferroics.
@article{arxiv.1209.3293,
title = {Room-temperature multiferroic hexagonal LuFeO$_3$ films},
author = {Wenbin Wang and Jun Zhao and Wenbo Wang and Zheng Gai and Nina Balke and Miaofang Chi and Ho Nyung Lee and Wei Tian and Leyi Zhu and Xuemei Cheng and David J. Keavney and Jieyu Yi and Thomas Z. Ward and Paul C. Snijders and Hans M. Christen and Weida Wu and Jian Shen and Xiaoshan Xu},
journal= {arXiv preprint arXiv:1209.3293},
year = {2013}
}