Rational A-Site Entropy Engineering in Perovskites: Dual-Exchange Enhanced Magnetoelectric Coupling for Ultra-Efficient Microwave Absorption.

ABSTRACT: High-entropy engineering at the A-site, combined with the variable valence states of Mn ions and diverse bonding configurations of perovskite elements and structures, presents new opportunities for the development and application of high-temperature electromagnetic wave-absorbing materials. In this study, the magnetic and dielectric properties of AMnO₃ are controlled by designing A-site elements with various ionic radii and entropies. The microwave-absorption performance of (La_0.2Ba_0.2Sr_0.2Ca_0.2Na_0.2)MnO₃ high-entropy perovskites is significantly higher than those of AMnO₃ with different ionic radii and (Ba_1/3Sr_1/3Ca_1/3)MnO₃ medium-entropy perovskites. Specifi

SUBMITTER: Li M 

PROVIDER: S-EPMC12766988 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature