High-temperature ferrimagnetic order triggered metal-to-insulator transition in CaCu₃Ni₂Os₂O₁₂.

ABSTRACT: Ferromagnetic order-induced insulator-to-metal transitions via the double exchange mechanism have been studied widely. In contrast, ferromagnetic or ferrimagnetic spontaneous magnetization induced metal-to-insulator transitions (MITs), especially occurring above room temperature, remain extremely limited, although such magnetoelectric materials hold great potential for low-loss multifunctional electronic and spintronic devices. Here, a novel 3d/5d hybridized quadruple perovskite oxide, CaCu₃Ni₂Os₂O₁₂, was synthesized. It undergoes long-range Cu²⁺(↑)-Ni²⁺(↑)-Os⁶⁺(↓) ferrimagnetic order with a high Curie temperature of 393 K, maintaining a saturated magnetization of 2.15 μ_B/f.u. at 300 K. Intriguingly, an

SUBMITTER: Ye X 

PROVIDER: S-EPMC12012069 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature