Thermodynamics of compositionally complex ("high-entropy") oxides – A-site mixed (5R0.2)CoO3-δ (R = rare-earth element) perovskite-type cobaltites. - Sereda, Vladimir V.; Tsvetkov, Dmitry S.; Sereda, Anna V.; Malyshkin, Dmitry A.; Ivanov, Ivan L.; Bajenova, Irina A.; Kuzovchikov, Semen S.; Khvan, Alexandra V.; Zuev, Andrey Yu. (Acta Materialia, 2026)