We investigate the effect of Mn substitution on the electronic, magnetic, and electrical transport properties of ${\mathrm{Fe}}_2{\mathrm{Ti}}_{1-x}{\mathrm{Mn}}_x\mathrm{Sn}$. Spin-polarized density of states calculations using density functional theory indicate a half-metallic ground state in Mn-rich compositions. Localized magnetic moments at Mn sites interact through the conduction electron cloud. Electrical resistivity and magnetotransport measurements show dominant Kondo-like scattering at low temperatures alongside a distinctive linear negative temperature coefficient of resistance at higher temperatures. These findings are further supported by specific heat measurements. Isothermal magnetization as a function of the applied magnetic field identifies the magnetic ground state of ${\mathrm{Fe}}_2{\mathrm{Ti}}_{1-x}{\mathrm{Mn}}_x\mathrm{Sn}$ compositions as a ferromagnet with a wandering axis that aligns with the direction of the applied field. Temperature-dependent magnetization measurements highlight features indicative of weak anisotropy in the system, while the x-ray diffraction analysis reveals a highly ordered cubic structure with reduced antisite disorder. Investigation of the local crystal structure using x-ray absorption fine structure spectroscopy shows that the random anisotropy arises from local lattice distortions around Mn atoms. These findings shed light on the emergence of a spin-polarized band structure and a unique magnetic ground state in Mn-substituted ${\mathrm{Fe}}_2{\mathrm{Ti}}_{1-x}{\mathrm{Mn}}_x\mathrm{Sn}$, offering insights into spintronic materials.

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• Density of states
• Electrical conductivity
• Kondo effect
• Magnetic anisotropy
• Magnetotransport
• Specific heat
• X-ray absorption fine structure spectroscopy