Temperature-dependent magnetic anisotropy in the layered magnetic semiconductors CrI3 and CrBr3

Nils Richter, Daniel Weber, Franziska Martin, Nirpendra Singh, Udo Schwingenschlögl, Bettina V. Lotsch & Mathias Kläui
Chromium trihalides are layered and exfoliable semiconductors and exhibit unusual magnetic properties with a surprising temperature dependence of the magnetization. By analyzing the evolution of the magnetocrystalline anisotropy with temperature in chromium iodide CrI3, we find it strongly changes from K-u = 300 +/- 50 kJ/m(3) at 5 K to Ku = 43 +/- 7 kJ/m(3) at 60 K, close to the Curie temperature. We draw a direct comparison to CrBr3, which serves as a...
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