Just by 'stretching' a material slightly, we can double its magnetic power.
April 17, 2026
Original Paper
Strain-Mediated Lattice Reconstruction Enhances Ferromagnetism in Cr2Ge2Te6/WTe2 van der Waals Heterobilayers
arXiv · 2604.13640
The Takeaway
Making materials that stay magnetic at higher temperatures is a major goal for modern electronics. Researchers found that by stacking two specific 2D materials, they created a lattice distortion (basically a microscopic stretch) that doubled the temperature at which the material remains magnetic. This is a huge leap because it shows we can tune magnetism through physical strain rather than just chemical changes. It means we could build ultra-fast memory for your phone that works better and lasts longer. It is like realizing you can make a car twice as fast just by adjusting the tension on its frame.
From the abstract
Van der Waals (vdW) heterostructures enable tailored electronic and magnetic phases by stacking atomically thin layers with pristine interfaces. Here, we investigate fully 2D Cr2Ge2Te6/WTe2 heterostructures and identify a strong enhancement of ferromagnetism in Cr2Ge2Te6 (CGT). Magnetotransport measurements across multiple devices with WTe2 thicknesses ranging from monolayer to bulk reveal a robust anomalous Hall effect together with a more than twofold increase of the Curie temperature and subs