%AOlmos, R.%ACosio, A.%ASaiz, C.%AMartinez, L.%AShao, L.%AWang, Q.%ASingamaneni, S.%BJournal Name: MRS Advances %D2019%I %JJournal Name: MRS Advances %K %MOSTI ID: 10113332 %PMedium: X %TMagnetic Properties of Proton Irradiated Fe 2.7 GeTe 2 Bulk Crystals %Xvan der Waals (vdW) magnetic materials show promise in being the foundation for future spintronic technology. The magnetic behavior of Fe2.7GeTe2 (FGT), a vdW itinerant ferromagnet, was investigated before and after proton irradiation. Proton irradiation of the sample was carried out at a fluence of 1×1018 cm-2. The magnetization measurements revealed a small increase of saturation magnetization (Ms) of about 4% upon proton irradiation of the sample, in which, the magnetic field was applied parallel to the c-axis. X-ray photoelectron spectroscopy for pristine and irradiated FGT revealed a general decrease in intensity after irradiation for Ge and Te and an increase in peak intensity of unavoidable surface iron oxide. Furthermore, no noticeable change in the Curie temperature (TC =152 K) is observed in temperature dependent magnetization variation. This work signifies the importance of employing protons in tuning the magnetic properties of vdW materials. %0Journal Article