High-entropy oxides (HEOs), a class of compounds that include five or more elemental species, have gained increasing attractions for the capability of optimizing target properties. To date, even though some...

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Single-phase multiferroic materials of rare-earth orthoferrites with magnetism and ferroelectricity are of great technological importance in storage devices. However, the polarization of these materials is generally weak (0.01 μC⋅cm −2 ), and the ferroelectricity is reported to exist below Journal of Advanced Ceramics https://mc03.manuscriptcentral.com/jacer 2 room temperature. Here, (Bi0.2La0.2Y0.2Dy0.2Tb0.2)FeO3 (BLYDTFO) high entropy oxide that exhibits a saturation polarization of 5.3 μC⋅cm −2 at the electric field of 45 kV⋅cm −1 at room temperature was designed and fabricated by the conventional solid phase method. The results show that the configurational entropy introduces atomic disorder and a larger tilt of BO6 octahedron, which facilitates a 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 rare-earth orthoferrites to enhance ferroelectricity in multiferroic applications.

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