Anomalous dielectric and magnetic behavior induced by the orthorhombic-cubic phase transition in high-entropy perovskite ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-02-01 DOI:10.1016/j.ceramint.2024.12.093

Hao Zheng , Xiaoyu Li , Yaohang Gu , Yi Zhang , Xiaoyan Zhang , Xiwei Qi

引用次数: 0

Abstract

High-entropy materials containing five or more metal cations provide a versatile platform for optimizing physical properties through targeted cation design. This study synthesized (Bi_0.2Sm_0.2Eu_0.2Dy_0.2Tb_0.2)FeO₃ ceramic using the conventional solid-state method and investigated its temperature-induced phase transitions. The dielectric constant was greatly enhanced from approximately 2 × 10³ to 1.2 × 10⁴. This growth occurred during phase transitions without compromising dielectric performance due to charge compensation by oxygen vacancies. Furthermore, saturation magnetization increased from 0.53 to 2.08 emu·g⁻¹ with elevating sintering temperatures. These findings offer valuable insights into modulating the electrical and magnetic properties of BiFeO₃-based high-entropy ceramics.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.