High-entropy materials emerged as a field of research in 2004, when the first research on high-entropy alloys was published. The scope was soon expanded from high-entropy alloys to medium-entropy alloys, as well as to ceramics, polymers and composite materials. A fundamental understanding on high-entropy materials was proposed in 2006 by the 'four core effects' - high-entropy, severe-lattice-distortion, sluggish-diffusion and cocktail effects - which are often used to describe and explain the mechanisms of various peculiar phenomena associated with high-entropy materials. Throughout the years, the effects have been examined rigorously, and their validity has been affirmed. This Perspective discusses the fundamental understanding of the four core effects in high-entropy materials and gives further insights to strengthen the understanding for these effects. All these clarifications are believed to be helpful in understanding low-to-high-entropy materials as well as to aid the design of materials when studying new compositions or pursuing their use in applications.

Wei-Lin Hsu

Che-Wei Tsai

An-Chou Yeh

Jien-Wei Yeh

Nature reviews. Chemistry

NATURE REVIEWS CHEMISTRY 是一本在线期刊，每周出版化学内所有学科的评论、观点和评论。我们的评论旨在对所选主题进行平衡和客观的分析——对相关科学文献的描述和简单的讨论掌握任何化学相关学科的应届毕业生，并向主要研究人员和行业研究科学家通报最新进展。评论应该为作者提供对未来方向的洞察力以及他们对该领域研究人员面临的主要挑战的看法。观点——顾名思义——从稍微不同的角度看待一个话题。他们可能会提供更多的个人观点，解释某个主题的历史背景，或讨论与学术界和工业界化学研究相关的一些社会、伦理或环境因素。我们的评论针对化学中的热点问题——目的是涵盖化学家普遍感兴趣的主题不一定关注化学研究的结果或实践。这可能包括但不限于化学教育的讨论和学术环境之外的研究实践。评论、观点和评论由编辑团队委托。

Nature Reviews Chemistry is an online journal that publishes reviews, perspectives, and commentaries across all disciplines of chemistry on a weekly basis. Our reviews aim to provide a balanced and objective analysis of selected topics, helping recent graduates grasp relevant scientific literature and keeping leading researchers and industry scientists informed of the latest developments. Reviews should offer authors insights into future directions and perspectives on the major challenges faced by researchers in the field. Perspectives, as the name suggests, view a topic from slightly different angles. They may provide more personal insights, explain the historical context of a subject, or discuss some social, ethical, or environmental factors related to chemical research in academia and industry. Our reviews focus on hot topics in chemistry, aiming to cover subjects of general interest to chemists, not necessarily limited to the results or practices of chemical research. This may include discussions on chemical education and research practices outside the academic environment. Reviews, perspectives, and commentaries are commissioned by the editorial team.

《Nature Reviews Chemistry》是一本在线期刊，每周发布化学各个领域的评论、观点和综述。我们的评论旨在对选定主题进行平衡和客观的分析，帮助应届毕业生掌握相关科学文献，并向主要研究人员和行业科学家通报最新进展。评论应为作者提供对未来研究方向的洞察，以及对该领域研究人员面临的主要挑战的看法。观点文章则从不同的角度探讨某一主题，可能会提供更多个人见解，解释某个主题的历史背景，或讨论与学术界和工业界化学研究相关的社会、伦理或环境因素。我们的评论关注化学中的热点问题，旨在涵盖化学家普遍感兴趣的主题，而不一定局限于化学研究的结果或实践。这可能包括但不限于对化学教育的讨论以及学术环境之外的研究实践。评论、观点和综述均由编辑团队委托撰写。

Category	Quartile
化学	1
化学, 化学综合	1

Clarifying the four core effects of high-entropy materials.

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Category	Quartile
CHEMISTRY, MULTIDISCIPLINARY	1