Electronic Structure and Magnetic Properties of a Rare-Earth-Based Antiferromagnet ErNi₃Ga₉

Recently, RNi₃(Ga/Al)₉ intermetallic materials have been studied for their richness in broad range of exotic crystal, magnetic, and thermodynamic behaviors. Despite progress in magnetic, thermodynamic, and neutron diffraction studies, the electronic structure studies of these systems are lacking. Here, we present the electronic structure of ErNi3Ga9 probed by angle-resolved photoemission spectroscopy aided by first-principles calculations as well as magnetic and thermodynamic measurements. This study adds valuable platform to understand the electronic and magnetic properties in the chiral RNi₃(Ga/Al)₉ systems and opens up avenues to explore the application of these systems in various fields.