Fig. 6. (a) X-ray diffractograms of four-component derivatives of (MgCoNiCuZn)O as a substrate; (b) DFT analysis of four diffractive phase compositions by mixing enthalpy. Reproduced from Ref [94]. Copyright Elsevier 2024. (c) Side diagram of thin film battery with 50 nmLi(CrMnFeCoNiCu)2 (001) as positive electrode, and cyclic voltammogram. Reproduced from Ref [95]. Copyright American Chemical Society 2022. (d) CTE and Fracture toughness of HEO-La, Nd, Gd, Dy. Reproduced from Ref [97]. Copyright Elsevier 2024. (e) the XRD patterns of the samples. It can be seen that RE2Zr2O7 and RE2Hf2O7 failed to form single-phase high-entropy pyrochlore phase; RE2Ce2O7 and RE2Pr2O7HEOs, exhibited a single phase structure with a fluorite-type structure. Reproduced from Ref [99]. Copyright Elsevier 2025. (f) Calculation of thermal conductivity of (EuErLuYYb)2O3,(SmErLuYYb)2O3 and Y2O3. Reproduced from Ref [105]. Copyright Tsinghua University Press 2021. (g) Thermal conductivity $\kappa $ curve of HEO4, 5, 7-10 and Eu2O3. Reproduced from Ref [104]. Copyright Elsevier 2023.
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