Chromium ii iodide full#
Chromium ii iodide free#

Intercalated chromium(III) iodide with Li ions can not only tune the semiconducting ultrathin CrI 3 into half-metallic, but can also largely improve the Curie temperature ( T C) and the magnetic moment simultaneously. With large out-of-plane magnetic anisotropy energy and strong magneto-optical effects in these single-spin ferromagnetic semiconducting ultrathin films, CrI 3 finds applications in high density semiconductor magneto–optical and low-power spintronic nanodevices. Chromium(III) iodide powder is suitable for liquid chemical exfoliation to prepare CrI 3 nanosheets and nanoparticles down to few-layer films.ĢD CrI 3 is a promising candidate for the van der Waals bonded ferromagnetic devices since its ferromagnetism can be maintained upon exfoliating of bulk crystals down to its single layer.īeing a ferromagnetic semiconductors exhibiting stronger magnetic anisotropy, Layered 2D CrI 3 is predicted to have many potential applications such as magnetoresistance, magnetic photo-galvanic and magneto–optical effects. The ferromagnetic and antiferromagnetic states can be switched on and off by changing the external gate voltage.Ĭhromium(III) iodide single crystals can be used to prepare monolayer and few-layer CrI 3 by mechanical or liquid exfoliation.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.

Chromium ii iodide full#

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