In this study, we investigate the electronic, magnetic properties of $\text{SnC/MnSe}X$ ($X=\text{Se},\text{Te}$) heterostructures using density functional theory (DFT) and atomistic spin simulations. The $\mathrm{SnC}/{\mathrm{MnSe}}_2$ heterostructure exhibits half-metallicity, while SnC/MnSeTe and SnC/MnTeSe display metallic behavior. Noncollinear calculations reveal an out-of-plane easy magnetization axis for $\mathrm{SnC}/{\mathrm{MnSe}}_2$ and SnC/MnTeSe, while SnC/MnSeTe has an in-plane axis. The Curie temperature ($T_{\mathrm{c}}$) is significantly enhanced in $\mathrm{SnC}/{\mathrm{MnSe}}_2$, demonstrating the potential for robust magnetic ordering. Moreover, we highlight the crucial role of the Dzyaloshinskii-Moriya interaction (DMI) in stabilizing skyrmions, emphasizing its enhancement through inversion symmetry breaking. Notably, the resulting DMI values are comparable to those in well-known skyrmion-hosting materials such as Co/Pt and Fe/Ir. Néel-type skyrmions form in these heterostructures, exhibiting tunable stability under varying temperature, magnetic fields, and electric fields. This tunability allows control over skyrmion size, phase transitions, and energy barriers, highlighting the promise of $\text{SnC/MnSe}X$ for next-generation spintronic applications such as high-density data storage and advanced computing technologies.

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• First-principles calculations
• Magnetic anisotropy
• Magnetic interactions
• Magnetic order
• Spin dynamics
• Spin-orbit coupling
• 2-dimensional systems
• Ferromagnets
• Janus materials