A Genuine Two-Dimensional Ising Ferromagnet with Magnetically Driven Re-entrant Transition

摘要

Inorganic compounds made up of low-dimensional ferromagnetic (FM) units display fascinating properties and provide a rich opportunity to investigate FM ground states, field-induced transitions, and magnetization steps. Even the spin-valve effect, realized in multilayer thin films, is found in the magnetic metal Ca3Ru2O7 and its Cr-doped analogue in which FM double-perovskite layers are antiferromagneti-cally coupled. The inorganic compound Cr2Si2Te6, also consisting of FM layers, turns out to be a unique example of a bulk 2D FM Ising system.