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Van der Waals (vdWs) crystals have attracted a great deal of scientificattention due to their interesting physical properties and widespread practicalapplications. Among all, CrSiTe3 (CST) is a ferromagnetic semiconductor withthe Curie temperature (TC) of ~32 K. In this letter, we study the magneticproperties of bulk CST single-crystal upon proton irradiation with the fluenceof 1x1018 protons/cm2. Most significantly, we observed an enhancement (23%) inthe saturation magnetization from 3.9 {\mu}B to 4.8 {\mu}B and is accompaniedby an increase in the coercive field (465-542 Oe) upon proton irradiation.Temperature-dependent X-band electron paramagnetic resonance measurements showno additional magnetically active defects/vacancies that are generated uponproton irradiation. The findings from X-ray photoelectron spectroscopy andRaman measurements lead us to believe that modification in the spin-latticecoupling and introduction of disorder could cause enhancement in saturationmagnetization. This work demonstrates that proton irradiation is a feasiblemethod in modifying the magnetic properties of vdWs crystals, which representsa significant step forward in designing future spintronic andmagneto-electronic applications.

Enhanced Magnetization from Proton Irradiated Bulk van der Waals Magnet CrSiTe3