Transport and magnetotransport properties of the single-atom-thick ${\mathrm{EuPb}}_3$ kagome compound on Si(111) were explored in situ using the linear four-point-probe technique within a temperature range from 2.5 to 40 K and at the magnetic field varied from $-6$ to $+6\mathrm{T}$. Our results revealed that ${\mathrm{EuPb}}_3$ displays the occurrence of the magnetic critical temperature of 5 K and two successive magnetoresistance jumps at the magnetic fields of 0.2 T and approximately 1.0 T, both exhibiting considerable hysteresis. Our density functional theory analysis suggests that the ground-state magnetic configuration of the single-atomic-layer metallic ${\mathrm{EuPb}}_3$ is possibly striped antiferromagnetic, with Eu magnetic moments aligned perpendicular to the surface. The occurrence of the magnetic hysteresis at the field-induced transitions is a signature of the first-order transitions and magnetocrystalline anisotropy in the ${\mathrm{EuPb}}_3/\mathrm{Si}\left(111\right)$ system.

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• Electrical conductivity
• Magnetotransport
• Surface reconstruction
• 2-dimensional systems
• Magnetic systems
• Surfaces
• First-principles calculations
• Photoemission spectroscopy
• Resistivity measurements
• Scanning tunneling microscopy