Monolayer CrI 3 has been confirmed to be an intrinsic 2D Ising ferromagnetic (FM) material with a suitable band gap of about 1.2 eV.Properties of Chromium(III) IodideĪfter exfoliation of crystals or powder, chromium(III) iodide typically has the following properties:ĬrI 3 exhibits strong magnetic anisotropy.įew-layer CrI 3 has a layered antiferromagnetic (AFM) phase with a lower ordering temperature of 45 K and a monoclinic stacking. Top and side view of single-layer chromium(III) iodide. The Pristine monolayer CrI 3 exhibits a small trigonal distortion of the CrI 6 octahedron, with the edge-shared CrI 6 octahedra forming a honeycomb lattice of six Cr atoms. The structure at low temperature is rhombohedral (R3, BiI 3 -type) and the high temperature structure is monoclinic (C2/m, AlCl 3 -type). Single crystals of chromium(III) iodide is a layered and easily cleavable insulating ferromagnet with Curie temperature of 61 K.
#CHROMIUM II IODIDE FREE#
Free worldwide shipping on qualifying orders.Can be used to produce single or few-layer sheets.Available as a powder or as individual crystals.We supply low price chromium(III) iodide in several different forms for a range of applications.Ĭhromium(III) iodide powder can also be used to prepare CrI 3 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication).
Bulk CrI 3 is ferromagnetic (FM) with a Curie temperature of 61 K and a rhombohedral layer stacking, while few-layer CrI 3 has a layered antiferromagnetic (AFM) phase with a lower ordering temperature of 45 K and a monoclinic stacking.Ĭhanging the spin direction of CrI 3 via an external field can significantly alter the electronic band structures, including a direct-to-indirect bandgap transition, Fermi surface and topological electronic states modification. Direct-to-indirect bandgap transition can be used to develop magneto-optoelectronic device where the photoconductivity can be switched by an external magnetic field.
The magnetic properties of CrI 3 are the layer thickness and stacking order dependent. Unlike chromium trichloride which shows a 2D-Heisenberg magnetic behaviour, CrI 3 exhibits stronger magnetic anisotropy promoting a 3D magnetic characteristic with larger van der Waals gap thus smaller cleavage energy. Chromium(III) iodide (also known as chromium triiodide CrI 3) belongs to a rare group of layered transition metal trichalcogenides (TMTCs) ferromagnetic semiconductors.
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