Controlling Magnetism in the 2D van der Waals Antiferromagnet CrPS<sub>4</sub> via Ion Intercalation.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41664635.
- Also identified by DOI 10.1021/acs.nanolett.5c05445 and PMC identifier 12983355.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Two-dimensional (2D) van der Waals (vdW) magnetic materials are platforms in which inserting chemical species into their interlayer gaps offers a powerful route to engineer magnetism. Here, we focus on the A-type antiferromagnetic semiconductor CrPS<sub>4</sub> (<i>T</i><sub>N</sub> = 38 K) and investigate its electronic and magnetic properties upon intercalation of lithium (Li<sup>+</sup>) and organic tetrabutylammonium (TBA<sup>+</sup>) ions using first-principles calculations. Li<sup>+</sup> incorporation induces a semiconductor-to-metal transition in CrPS<sub>4</sub> and triggers a switching from an out-of-plane antiferromagnetism state to an in-plane ferromagnetic state. This is accompanied by an increase of the ordering temperature, reaching a 5-fold enhancement for Li<sub>0.5</sub>CrPS<sub>4</sub>. TBA<sup>+</sup> intercalation expands the vdW gap, decoupling CrPS<sub>4</sub> layers and stabilizing in-plane ferromagnetism with <i>T</i><sub>C</sub> > 100 K. Furthermore, it enhances magnon group velocities and yields more isotropic magnon transport. This work highlights intercalation as a powerful approach for tailoring magnetism, paving the way for tunable 2D-layered magnetic materials for spintronic and magnonic applications.