Epitaxial entropy-stabilized oxides: Growth of chemically diverse phases via kinetic bombardment

George N. Kotsonis, Christina M. Rost, David T. Harris, Jon Paul Maria

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

This paper explores thin films of the entropy-stabilized oxide (ESO) composition MgxNixCoxCuxZnxScxO (x ~ 0.167) grown by laser ablation in incremental gas pressures and O2/Ar ratios to modulate particle kinetic energy and plume reactivity. Low pressures supporting high kinetic energy adatoms favor the kinetic stabilization of a single rocksalt phase, while high pressures (low kinetic energy adatoms) result in phase separation. The pressure threshold for phase separation is a function of O2/Ar ratio. These findings suggest large kinetic energies facilitate the assembly and quench of metastable ESO phases that may require immoderate physical or chemical conditions to synthesize using near-equilibrium techniques.

Original languageEnglish (US)
Pages (from-to)1371-1377
Number of pages7
JournalMRS Communications
Volume8
Issue number3
DOIs
StatePublished - Sep 1 2018

All Science Journal Classification (ASJC) codes

  • General Materials Science

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