We report the observation of weak ferromagnetism and possible non-Fermi-liquid behavior in itinerant electronic material ${\mathrm{Co}}_3\mathrm{SnC}$ via magnetic properties, electrical transport, and specific heat under various magnetic fields. The analysis of magnetic properties suggests that ${\mathrm{Co}}_3\mathrm{SnC}$ undergoes a noncollinear itinerant ferromagnetic-paramagnetic phase transition around 3.6 K. With this transition, non-Fermi-liquid (NFL) behavior appears at low temperature covering a wide temperature range. The features of NFL are revealed by the power-law temperature dependence of resistivity and also proved by the $–T\log T$ dependence upturn in specific heat and the $T^{4/3}$ dependence of inverse susceptibility. With increasing the fields, the temperature coefficient of the $T^2$ term in the resistivity data shows a ${\left(H–H_{\mathrm{c}}\right)}^{-0.5}$ divergence approaching the $H_{\mathrm{c}}$ and reduces monotonously with increasing the field further, apart from the usual $1/\left(H–H_{\mathrm{c}}\right)$ dependence with the whole Fermi surface under the singular scattering. The exponent $n$ in the temperature dependence of resistivity shows an increase from $n=1.0$ to 2.0 with increasing the field as the evidence for the field-induced crossover from NFL to FL behavior; it is thought that field dependence of magnetic ground states should be responsible for this crossover; the relative mass enhancement factor $\lambda \left(H\right)/\lambda \left(0\right)$ reduces monotonically to nearly 60% at 9.0 T, indicating the gradual suppression of magnetic fluctuations and electron-electron scattering. Our results indicate that ${\mathrm{Co}}_3\mathrm{SnC}$ is a candidate for exploring itinerant quantum materials.

• Received 8 June 2019
• Revised 29 July 2020
• Accepted 29 July 2020

DOI:https://doi.org/10.1103/PhysRevB.102.085153