  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 a series of inherently nanolaminated V2(A'xSn1-x)C (A'=Fe, Co,
Ni and Mn, and combinations thereof, with x=1/3) synthesized by an alloy-guided
reaction. The simultaneous occupancy of the four magnetic elements and Sn, the
individual single-atom-thick A layers in the compound constitute
high-entropy-alloy analogues, two-dimensional in the sense that the alloying
exclusively occurs in the A layers. V2(A'xSn1-x)C exhibit distinct
ferromagnetic behavior that can be compositionally tailored from the
multielement A-layer alloying. This two-dimensional alloying provides a
structural-design route with expanded chemical space for discovering materials
and exploit properties.
