Magnetic Correlations in the Quasi-2D Semiconducting Ferromagnet CrSiTe${}_3$

Abstract

Intrinsic, two-dimensional ferromagnetic semiconductors are an important class of materials for overcoming the limitations of dilute magnetic semiconductors for spintronics applications. CrSiTe${}_3$ is a particularly interesting member of this class, since it can likely be exfoliated down to single layers, where T${}_C$ is predicted to increase dramatically. Establishing the nature of the magnetism in the bulk is a necessary precursor to understanding the magnetic behavior in thin film samples and the possible applications of this material. In this work, we use elastic and inelastic neutron scattering to measure the magnetic properties of single crystalline CrSiTe${}_3$. We find that there is a very small single ion anisotropy favoring magnetic ordering along the $c$-axis and that the measured spin waves fit well to a model where the moments are only weakly coupled along that direction. Finally, we find that both static and dynamic correlations persist within the $ab$-plane up to at least 300 K, strong evidence of this material's two-dimensional characteristics that are relevant for future studies on thin film and monolayer samples.

8 pages, 5 figures

References in corpus (2)

• Graphene Spintronics
• Magnetic ground state of semiconducting transition metal trichalcogenide monolayers

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