A study of the structural, thermodynamic, magnetic, and optoelectronic properties of the Dy2Be2GeO7 complex oxide via ab initio methods

Review Chemistry, Multidisciplinary

Classification of Solid Oxide Fuel Cells

Kairat A. Kuterbekov et al.

Summary: This review summarizes various types of solid oxide fuel cells (SOFC) and describes their structural features, advantages, and disadvantages. Among the well-studied dual-chamber SOFC, those with anode-supported design and oxygen-ion conducting electrolyte are found to be the most suitable for operation at temperatures below 800 degrees C. Other promising types for low-temperature operation include SOFC with proton-conducting electrolyte and electrolyte-free fuel cells, although further research and development are needed for commercialization.

NANOMATERIALS (2022)

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Article Crystallography

Spin-Polarized Study of the Structural, Optoelectronic, and Thermoelectric Properties of the Melilite-Type Gd2Be2GeO7 Compound

Fafa Chiker et al.

Summary: The present work is a theoretical study that investigates the structural and spin-polarized dependent optoelectronic thermoelectric properties of Gd(2)Be(2)GeO(7) compound. The results show that the compound is more stable in the ferromagnetic order and has a wide bandgap. Moreover, the frequency-dependent linear optical spectra and spin-polarized dependent transport properties are also studied.

CRYSTALS (2022)

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Article Chemistry, Inorganic & Nuclear

Structure and Magnetic Properties of Melilite-Type Compounds RE2Be2GeO7 (RE = Pr, Nd, Gd-Yb) with Rare-Earth Ions on Shastry-Sutherland Lattice

Malik Ashtar et al.

Summary: Rare-earth-based frustrated magnets combine strong spin-orbit coupling, geometric frustration, and anisotropic exchange interaction to produce diverse exotic magnetic ground states such as quantum spin liquid. The synthesized melilite-type RE2Be2GeO7 compounds exhibit no magnetic ordering except for Tb2Be2GeO7, which undergoes antiferromagnetic transition with Neel temperature around 2.5 K. Among the compounds, Gd2Be2GeO7 shows the maximum magnetic entropy change up to 54.8 J K-1 kg-1 at 7 T, while Dy2Be2GeO7 has the largest value of 16.1 J K-1 kg-1 at 2 T, indicating potential magnetocaloric effects in liquid helium temperature regimes.

INORGANIC CHEMISTRY (2021)

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Article Materials Science, Multidisciplinary