What is in a name: Defining "high entropy" oxides

Matthew Brahlek, Maria Gazda, Veerle Keppens, Alessandro R. Mazza, Scott J. McCormack, Aleksandra Mielewczyk-Gryń, Brianna Musico, Katharine Page, Christina M. Rost, Susan B. Sinnott, Cormac Toher, Thomas Z. Ward, Ayako Yamamoto

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


High entropy oxides are emerging as an exciting new avenue to design highly tailored functional behaviors that have no traditional counterparts. Study and application of these materials are bringing together scientists and engineers from physics, chemistry, and materials science. The diversity of each of these disciplines comes with perspectives and jargon that may be confusing to those outside of the individual fields, which can result in miscommunication of important aspects of research. In this Perspective, we provide examples of research and characterization taken from these different fields to provide a framework for classifying the differences between compositionally complex oxides, high entropy oxides, and entropy stabilized oxides, which is intended to bring a common language to this emerging area. We highlight the critical importance of understanding a material's crystallinity, composition, and mixing length scales in determining its true definition.

Original languageEnglish
Article number110902
JournalAPL Materials
Issue number11
Publication statusPublished - 2022 Nov 1

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering


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