Co₃Sn₂S₂ (Cobalt Tin Sulfide)

Co₃Sn₂S₂ is a layered kagome magnet and a magnetic Weyl semimetal. The Co atoms form a kagome lattice with out-of-plane ferromagnetic order (Curie temperature ≈ 175 K), which, combined with topologically nontrivial bands, gives rise to a giant anomalous Hall effect and anomalous Nernst effect, making it a landmark material for research on magnetic topology, kagome physics, and spintronics.

Growth method: Flux growth.

Sample specifications: Individual crystals measure approximately 3 mm, with a purity of up to 99.9999% (6N), and multiple high-quality single-crystal pieces included in each package.

Exfoliation: Difficult — strong interlayer bonding; mechanical exfoliation typically yields thick flakes, and ultrathin flakes are challenging to isolate.