@article{Ni2023, 
author = {Bo Ni and Ateer Bao and Yaohang Gu and Xiaoyan Zhang and Xiwei Qi},
title = {High-entropy enhanced room-temperature ferroelectricity in rare-earth orthoferrites},
year = {2023},
journal = {Journal of Advanced Ceramics},
volume = {12},
number = {4},
pages = {724-733},
keywords = {high-entropy, rare-earth orthoferrites, ferroelectricity, multiferroic materials},
url = {https://www.sciopen.com/article/10.26599/JAC.2023.9220715},
doi = {10.26599/JAC.2023.9220715},
abstract = {Single-phase multiferroic materials of rare-earth orthoferrites with magnetism and ferroelectricity are of great technological importance in storage devices. However, the polarization (P) of these materials is generally weak (0.01 μC·cm−2), and the ferroelectricity is reported to exist below room temperature (25 ℃). Here, (Bi0.2La0.2Y0.2Dy0.2Tb0.2)FeO3 (BLYDTFO) high-entropy oxides that exhibit a saturation P of 5.3 μC·cm−2 at the electric field (E) of 45 kV·cm−1 at room temperature was designed and fabricated by the conventional solid-phase method. The results show that configurational entropy introduces atomic disorder and a larger tilt of BO6 octahedron, which facilitates non-centrosymmetric distortion and ferroelectricity at room temperature compared with other single components (LaFeO3, YFeO3, DyFeO3, and TbFeO3). This high-entropy approach expands the compositional window of the rare-earth orthoferrites to enhance the ferroelectricity in multiferroic applications.}
}