Coexistence of structural and magnetic phases in van der Waals magnet CrI3

Author:

Meseguer-Sánchez Jaume,Popescu CatalinORCID,García-Muñoz José LuisORCID,Luetkens HubertusORCID,Taniashvili Grigol,Navarro-Moratalla EfrénORCID,Guguchia ZurabORCID,Santos Elton J. G.ORCID

Abstract

AbstractCrI3 has raised as an important system to the emergent field of two-dimensional van der Waals magnetic materials. However, it is still unclear why CrI3 which has a ferromagnetic rhombohedral structure in bulk, changed to anti-ferromagnetic monoclinic at thin layers. Here we show that this behaviour is due to the coexistence of both monoclinic and rhombohedral crystal phases followed by three magnetic transitions at TC1 = 61 K, TC2 = 50 K and TC3 = 25 K. Each transition corresponds to a certain fraction of the magnetically ordered volume as well as monoclinic and rhombohedral proportion. The different phases are continuously accessed as a function of the temperature over a broad range of magnitudes. Our findings suggest that the challenge of understanding the magnetic properties of thin layers CrI3 is in general a coexisting structural-phase problem mediated by the volume-wise competition between magnetic phases already present in bulk.

Funder

RCUK | Engineering and Physical Sciences Research Council

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry

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