Competing Magnetism in Layered Mixed Transition Metal Chalcogenides KCo_2-<i>x</i> Ni _<i>x</i> Se₂, KCo_2-<i>x</i> Ni _<i>x</i> S₂, and CsCo_2-<i>x</i> Ni _<i>x</i> Se₂.

ABSTRACT: Layered transition metal chalcogenides are a versatile class of compounds that exhibit exotic physical phenomena, including superconductivity, thermoelectric properties and magnetic properties. The magnetic properties of ThCr₂Si₂-type solid solutions KCo_2-x Ni _x Ch ₂ (Ch = S, Se; 0 ≤ x ≤ 2) with metallic properties were probed using magnetometry and powder neutron diffraction (PND). KCo₂Se₂ is ferromagnetic below ∼90 K and powder neutron diffraction (PND) showed evidence for long-range ferromagnetic order with localized moments of 0.6 μ_B per cobalt ion. With increasing nickel substitution, the system starts to order antiferromagnetically at x = 0.5. In these cas

SUBMITTER: Taskesen L 

PROVIDER: S-EPMC12288000 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature