High-entropy approach to engineering the magnetoelectric and magnetocaloric properties of manganites

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-01-13 DOI:10.1007/s12598-024-03124-7

Xin-Jie Xing, Zi-Yi Huo, Ning Jiang, Xiao-Lei Wang, Qi-Cheng Yan, Shi-Feng Zhao

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引用次数: 0

Abstract

High-entropy materials have attracted considerable attention in recent years owing to their unique structural characteristics, tailorable chemical composition, and tunable functional properties. In this study, the concept of entropy-mediated phase stabilization was combined with strongly correlated electron systems to achieve directional property control in single-phase manganites. As Ca and Cr are sequentially doped into (Pr_0.25La_0.25Nd_0.25Sm_0.25)MnO₃ at specific contents, the original weak ferromagnetic (FM) state with a spin-canted antiferromagnetic (AFM) background transforms into the charge-ordered AFM state, and then further transitions to the intense FM-AFM competition state. Magnetic state evolution also causes significant changes in electrical properties, highlighting the complex magnetoelectronic phase diagram of this system. Under specific doping conditions, the system exhibits a temperature-induced metamagnetic transition and a significant magnetocaloric effect, demonstrating interesting properties brought about by magnetic phase transitions. The complex magnetoelectric behavior induced by the coexistence and competition of multiple interactions is discussed by combining microstructural characterization with a magnetic theory framework. This study explores a method for effectively manipulating the physical properties of manganites based on the high-entropy concept, which is conducive to the development of new functional materials with kaleidoscopic characteristics.

Graphical abstract

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锰矿石磁电和磁热特性工程的高熵方法

近年来，高熵材料因其独特的结构特征、可定制的化学成分和可调节的功能特性而受到广泛关注。在本研究中，将熵介导相稳定的概念与强相关电子系统相结合，实现了单相锰矿石的定向性质控制。当Ca和Cr以一定的含量依次掺杂到（Pr0.25La0.25Nd0.25Sm0.25）MnO3中时，原具有自旋倾斜反铁磁（AFM）背景的弱铁磁（FM）态转变为电荷有序的AFM态，然后进一步过渡到强的FM-AFM竞争态。磁态演化也引起了电性能的显著变化，突出了该系统复杂的磁电子相图。在特定掺杂条件下，体系表现出温度诱导的超磁相变和显著的磁热效应，展示了磁相变带来的有趣性质。结合微观结构表征和磁性理论框架，讨论了多种相互作用共存和竞争引起的复杂磁电行为。本研究探索了一种基于高熵概念对锰矿石物理性质进行有效调控的方法，有利于开发具有万花千金特性的新型功能材料。图形抽象

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.