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Open AccessArticle

Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Academic Editor: Winnie Wong-Ng
Crystals 2017, 7(5), 121; https://doi.org/10.3390/cryst7050121
Received: 20 March 2017 / Revised: 18 April 2017 / Accepted: 23 April 2017 / Published: 27 April 2017
(This article belongs to the Special Issue Crystallography of Functional Materials)
Materials composed of two dimensional layers bonded to one another through weak van der Waals interactions often exhibit strongly anisotropic behaviors and can be cleaved into very thin specimens and sometimes into monolayer crystals. Interest in such materials is driven by the study of low dimensional physics and the design of functional heterostructures. Binary compounds with the compositions M X 2 and M X 3 where M is a metal cation and X is a halogen anion often form such structures. Magnetism can be incorporated by choosing a transition metal with a partially filled d-shell for M, enabling ferroic responses for enhanced functionality. Here a brief overview of binary transition metal dihalides and trihalides is given, summarizing their crystallographic properties and long-range-ordered magnetic structures, focusing on those materials with layered crystal structures and partially filled d-shells required for combining low dimensionality and cleavability with magnetism. View Full-Text
Keywords: layered materials; van der Waals; monolayer; transition metal compounds; halides; crystal structure; magnetism; magnetic structure layered materials; van der Waals; monolayer; transition metal compounds; halides; crystal structure; magnetism; magnetic structure
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McGuire, M.A. Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides. Crystals 2017, 7, 121.

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