2020/06/30 by Amilcar Bedoya-Pinto, Jing-Rong Ji, Avanindra K. Pandeya +9
Materials Science · Physics and Astronomy · #2D Materials and Applications #Anisotropy #Ferromagnetism #Graphene research and applications #Magnet #Magnetism in coordination complexes #Monolayer #Phase transition #Scaling #Universality (dynamical systems) #cond-mat.mes-hall #cond-mat.mtrl-sci #van der Waals force
paper · pdf · doi:10.1126/science.abd5146
published as Science, Vol 374, Issue 6567, pp. 616-620 (2021)
openalex created_date 2020/06/19 · arxiv created 2021/02/16 · openalex publication_date 2021/10/28 · arxiv updated 2021/12/21 · openalex updated_date 2026/08/05
Taking the measure of a magnet The recent discovery of magnetism in two-dimensional (2D) materials has inspired efforts to understand its nature. Whereas the magnetism of monolayers of chromium iodide (CrI 3 ) can be understood in terms of out-of-plane magnetic anisotropy, the related material chromium chloride (CrCl 3 ) has spins that lie in the plane. Bedoya-Pinto et al . used molecular beam epitaxy to grow monolayers of CrCl 3 on graphene and studied its magnetic properties. Using x-ray magnetic circular dichroism measurements, the authors found that monolayer CrCl 3 is a ferromagnet, unlike bulk CrCl 3 , which is antiferromagnetic. The scaling of the signal in the critical region indicated that the material belongs to the 2D-XY universality class, distinct from Ising magnetism, which some other 2D magnets exhibit. —JS