High-Throughput Selection and Experimental Realization of Two New Ce-Based Nitride Perovskites: CeMoN3 and CeWN3

Rachel Sherbondy, Rebecca Smaha, Christopher Bartel, Megan Holtz, Kevin Talley, Ben Levy-Wendt, Craig Perkins, Serena Eley, Andriy Zakutayev, Geoff Brennecka

Research output: Contribution to journalArticlepeer-review

11 Scopus Citations

Abstract

Nitride perovskites have only been experimentally realized in very few cases despite the widespread existence and commercial importance of perovskite materials. From oxide perovskites used in ultrasonics to halide perovskites that have revolutionized the photovoltaics industry, the discovery of new perovskite materials has historically impacted a wide number of fields. Here, we add two new perovskites, CeWN3 and CeMoN3, to the list of experimentally realized perovskite nitrides using high-throughput computational screening and subsequent high-throughput thin film growth techniques. Candidate compositions are first down-selected using a tolerance factor and then thermochemical stability. A novel competing fluorite-family phase is identified for both material systems, which we hypothesize is a transient intermediate phase that crystallizes during the evolution from an amorphous material to a stable perovskite. Different processing routes to overcome the competing fluorite phase and obtain phase-pure nitride perovskites are demonstrated for the CeMoN3-x and CeWN3-x material systems, which provide a starting point for the development of future nitride perovskites. Additionally, we find that these new perovskite phases have interesting low-temperature magnetic behavior: CeMoN3-x orders antiferromagnetically below TN ≈ 8 K with indications of strong magnetic frustration, while CeWN3-x exhibits no long-range order down to T = 2 K but has strong antiferromagnetic correlations. This work demonstrates the importance and effectiveness of using high-throughput techniques, both computational and experimental: they are integral to optimize the process of realizing two entirely novel nitride perovskites.

Original languageAmerican English
Pages (from-to)6883-6893
Number of pages11
JournalChemistry of Materials
Volume34
Issue number15
DOIs
StatePublished - 9 Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 The Authors. Published by American Chemical Society.

NREL Publication Number

  • NREL/JA-5K00-82765

Keywords

  • diffraction
  • magnetism
  • nitrides
  • perovskite
  • rare earth

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