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Magnetic Properties of Proton Irradiated Fe2.7GeTe2 Bulk Crystals

Published online by Cambridge University Press:  19 June 2019

R. Olmos
Affiliation:
Department of Physics, The University of Texas at El Paso, El Paso, TX79968, USA
A. Cosio
Affiliation:
Department of Physics, The University of Texas at El Paso, El Paso, TX79968, USA
C. L. Saiz
Affiliation:
Department of Physics, The University of Texas at El Paso, El Paso, TX79968, USA
L. M. Martinez
Affiliation:
Department of Physics, The University of Texas at El Paso, El Paso, TX79968, USA
L. Shao
Affiliation:
Department of Nuclear Engineering, Texas A&M University, College Station, TX77845, USA
Q. Wang
Affiliation:
Department of Physics and Astronomy, West Virginia University, Morgantown, WV26506, USA
S. R. Singamaneni
Affiliation:
Department of Physics, The University of Texas at El Paso, El Paso, TX79968, USA
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Abstract

van 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.

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Copyright © Materials Research Society 2019 

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