Kagome magnets provide fertile platforms for field-tunable magnetic phases, electronic correlations, and quantum phenomena. However, the in-plane anisotropy within the kagome layers remains largely unexplored. Here we report the synthesis of ${\mathrm{Gd}}_3{\mathrm{TiBi}}_5$ single crystals featuring distorted Gd kagome layers, which exhibit an antiferromagnetic transition at $T_{\mathrm{N}}\approx 19\mathrm{K}$ and a pronounced in-plane anisotropic magnetization. The magnetic phase diagrams display successive field-driven magnetic phases separated by well-defined, anisotropic phase boundaries, indicating complex reorientation processes of ${\mathrm{Gd}}^{3+}$ moments under external magnetic fields. Notably, the in-plane angle-dependent magnetoresistance (ADMR) measurements uncover a snowflake-like ADMR pattern at low temperatures and under high magnetic fields, characterized by a pronounced sixfold symmetry with narrowed central spikes and additional shoulder-like modulations along each lobe. The sixfold ADMR is primarily attributed to the in-plane anisotropic magnetic transitions, highlighting the coupling between localized $\mathrm{Gd}\text{−}4f$ moments and itinerant electrons. DFT calculations further suggest that rotating the magnetic moment direction can drive a van Hove singularity across the Fermi level, potentially inducing a spin-orientation-dependent Fermi-surface reconstruction. These results establish ${\mathrm{Gd}}_3{\mathrm{TiBi}}_5$ as a promising platform for studying the interplay between frustrated magnetism and electrical transport and provide a useful framework for understanding magnetism-driven anisotropic transport.

Close

PrevNext

View figure in article

• Anisotropic magnetoresistance
• Magnetic anisotropy
• Magnetotransport
• Kagome lattice
• First-principles calculations