Synthesis and Characterization of Rare-Earth High-Entropy Perovskites

Perovskite oxides ABO₃ have garnered considerable interest in the scientific community due to their unique properties and wide-ranging potential applications. Adding complex compositional diversity, “high entropy” perovskites with 5 cations on a given lattice site offer the potential of tuning and combining properties, potentially revolutionizing applications in areas including energy storage, electronics, and photonics. Through careful selection of cations, we have applied the high entropy concept to synthesize a set of rare-earth perovskites REBO₃ (RE= La, Pr, Nd, Sm, Eu, Gd) with the B-site occupied by Sc, Al, Cr, Ni, and Fe in equimolar ratios. Using an extended set of characterization measurements, the effects of multi-component material design and rare earth selection on the electronic properties are explored.