About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Powder and Ceramic Materials Science
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Presentation Title |
Interplay Between Structure, Charge, and Spin in Entropy-Stabilized Oxides for Widely Tunable Responses |
Author(s) |
John Heron |
On-Site Speaker (Planned) |
John Heron |
Abstract Scope |
Entropy-stabilized oxides demonstrate a new and unprecedented degree of chemical control in materials. This broadens the compositional space of crystalline oxides and presents opportunities to understand and explore the local chemical and structural disorder. Here, I will discuss the control of stereochemically-driven structural disorder in single crystalline, rocksalt, (MgCoNiCuZn)O-type entropy-stabilized oxides through the incorporation of Co, Cu, and Mg cations. We harness the disorder to tune the degree of glassiness in the anisotropic antiferromagnetic magnetic structure. Electron transport measurements reveal a widely tunable conductivity via the Mg concentration that is mediated by hopping and correlated to the global disorder and defect density. Our findings demonstrate novel interplay between local and global structure, charge, and spin states in entropy-stabilized oxides for tunable magnetic and electronic responses.
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Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Thin Films and Interfaces, Electronic Materials |