Multielemental single-atom-thick <i>A</i> layers in nanolaminated V<sub>2</sub>(Sn, <i>A</i>) C (<i>A</i> = Fe, Co, Ni, Mn) for tailoring magnetic properties.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31879341.
- Also identified by DOI 10.1073/pnas.1916256117 and PMC identifier 6969549.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Tailoring of individual single-atom-thick layers in nanolaminated materials offers atomic-level control over material properties. Nonetheless, multielement alloying in individual atomic layers in nanolaminates is largely unexplored. Here, we report 15 inherently nanolaminated V<sub>2</sub>(<i>A</i> <sub>x</sub>Sn<sub>1-x</sub>)C (<i>A</i> = Fe, Co, Ni, Mn, and combinations thereof, with x ∼ 1/3) MAX phases synthesized by an alloy-guided reaction. The simultaneous occupancy of the 4 magnetic elements and Sn in the individual single-atom-thick A layers constitutes high-entropy MAX phase in which multielemental alloying exclusively occurs in the 2-dimensional (2D) A layers. V<sub>2</sub>(<i>A</i> <sub>x</sub>Sn<sub>1-x</sub>)C exhibit distinct ferromagnetic behavior that can be compositionally tailored from the multielement A-layer alloying. Density functional theory and phase diagram calculations are performed to understand the structure stability of these MAX phases. This 2D multielemental alloying approach provides a structural design route to discover nanolaminated materials and expand their chemical and physical properties. In fact, the magnetic behavior of these multielemental MAX phases shows strong dependency on the combination of various elements.