This study explores the magnetic and magnetotransport behavior of polycrystalline ErAlcompound. The polycrystalline compound adopts HoAl-type structures with the R-3m space group, No. 166-2 and hR60 configurations. Multiple magnetic orderings and two field-induced metamagnetic transitions are observed. ErAlexhibits a significant magnetocaloric effect (MCE),-ΔSM= 15.25 J kgKand high relative cooling power of 383 J kgwith applied magnetic field change (Δ) of 70 kOe near the paramagnetic to ferromagnetic transition, showcasing its potential for magnetic refrigeration technology. The compound also demonstrates metallic behavior, with a notable magnetoresistance of 48.5%at 2 K due to the suppression of antiferromagnetism. The magnetic phase diagram reveals four distinct phases influenced by temperature and magnetic field, identified through the study of the MCE.
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