A layered antiferromagnet that is easier to work with than most 2D magnets. Each layer is ferromagnetic with its spins pointing out of the plane, neighbouring layers point opposite ways, and thin flakes keep their magnetism after about a day in air – far longer than CrI3. Because it insulates at low temperature, information cannot cross it as an electric current, but it can travel as spin waves: magnons injected electrically at one contact are detected far away at another, and how strongly they prefer one direction can be tuned with a current.
They are coordination polyhedra. Only complete ones are drawn.
Three layers of CrPS4. They stack almost straight up: c leans only about 2° from the layer normal, 6.14 Å between layers. Below about 38 K the chromium moments line up within each layer and point opposite ways in neighbouring layers. Cell from Diehl and Carpentier, Acta Crystallographica B 33, 1399 (1977); COD 2106187.
Readiness runs lab → prototype → pilot → deployed.
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A spin-3/2 Cr3+ magnet whose ferromagnetic layers stack antiferromagnetically. Neutron scattering on bulk crystals shows two-dimensional magnetism overall, with important exchange along the chromium chains inside each layer and competing interactions that make the transition non-trivial. Anisotropy holds the spins out of the plane until a small field flops them. The low in-plane symmetry makes magnon dispersion and spin transport strongly anisotropic, so models need chain, inter-chain and interlayer exchange plus anisotropy; recent monolayer calculations point to long-range exchange as well.
Even–odd effects make layer number the first thing to pin down: count layers by optical contrast and Raman before any magneto-optics. Kerr microscopy sees net magnetisation only in odd layer numbers; even ones need spin-flop signatures or tunnelling magnetoresistance. For magnon transport, use nonlocal platinum injector and detector strips, separate first-harmonic (electrically injected) from second-harmonic (thermally generated) signals, and align the strips with the crystal axes found by polarised microscopy.
A research material for magnonics and antiferromagnetic spintronics. Its strengths are air stability, perpendicular anisotropy and electrical magnon injection with standard platinum contacts, and a lab demonstration has already stored multiple bits in the anisotropy of magnon transport. Ordering only below ~36 K rules out room-temperature devices, and there is no wafer-scale growth.
The newest items tagged CrPS4, from the news feed updated 5 Oct 2026.
A short-range spin correlation driven, strongly intercoupled spin-phonon-electronic state far above TN (~38K) is identified in the low dimensional van der Waals antiferromagnet CrPS4. Temperature-dependent Raman spectroscopy reveals spin-phonon coupling persisting up to T*~120K, concomitant with local lattice…
We develop a first-principles framework for magnetoelastic coupling in two-dimensional magnets based on a strain-dependent Heisenberg model. In this approach, strain derivatives of the exchange interactions provide direct access to magnetostriction and to the magnetic renormalization of the elastic tensor, establishing…
Crystal anisotropy provides a powerful route for realizing direction-dependent transport in solid-state systems. While its influence on electronic transport is well established, the role of anisotropy in magnon spin transport in van der Waals magnets is largely unexplored. Here, in a nonlocal geometry, utilizing the…
Layered van der Waals magnetic semiconductors provide a versatile platform for exploring excitonic phenomena intertwined with spin and lattice degrees of freedom, enabling excitons to act as sensitive probes of magnetic order. CrPS4 is a layered antiferromagnetic semiconductor that hosts rich excitonic features whose…
We investigate the magnetic properties of monolayer CrPS4 and NiPS3 by combining first-principles calculations, second-principles spin models, and Monte Carlo simulations. Unlike conventional approaches that truncate exchange interactions after only a few shells and determine them by fitting total energies, we extract…
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