IRON-DOPED GRAPHENE VIA CVD: TAILORING MAGNETIC PROPERTIES FOR ADVANCED SPINTRONICS AND DATA STORAGE DEVICES

Oudjertli Salah

Abstract: Fe-doped graphene grown by CVD carries immediate practical relevance for spintronics and magnetic storage its magnetic response is not fixed but tunable through doping chemistry, which is the property that makes it interesting. Three iron concentrations were explored in this study: 3%, 4%, and 6% Fe, introduced via ferrocene (Fe(C₅H₅)₂) as precursor onto high-purity copper foil substrates under CVD conditions. Magnetic behaviour was characterized by vibrating sample magnetometry (VSM) at room temperature. All three samples produced S-shaped M–H hysteresis loops the signature of soft ferromagnetic ordering with low coercivity (Hc) and low remanent magnetization (Mr). Saturation magnetization (Ms) rose with Fe content: 5 emu·g⁻¹ at 3%, 8 emu·g⁻¹ at 4%, and 10 emu·g⁻¹ at 6%, placing the 6% sample at the top of the magnetic response range examined here. Both Mr and Hc increased alongside Ms as doping level grew, reflecting stronger magnetic stability and pointing toward viable memory storage functionality. The Ms and Mr curves are notably non-linear with respect to concentration: the jump between 3% and 4% Fe is sharper than the step that follows, suggesting a shift in the governing magnetic interaction regime within that interval whether exchange coupling geometry, Fe cluster percolation, or lattice-level structural change is responsible remains to be determined. What the data establish clearly is that iron concentration is an effective handle on the magnetic properties of this material, and Fe-doped CVD graphene is a credible candidate for spintronic devices, magnetic sensors, and high-density data storage.

Keywords: Graphene, CVD, Graphene doped Fe, Magnetic Properties

DOI: 10.24874/PES08.02B.024

Recieved:   Revised:   Accepted:   
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