Materials Discovery
Materials Discovery
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Advancing beyond conventional doping-based ceramic design, our research explores high-entropy (HE) strategies to realize single-phase ceramic systems composed of multiple principal elements (>5) in near-equiatomic proportions. This approach offers extensive compositional flexibility, enabling enhanced structural stability, tunable functional properties.
Selected Works:
A. Sarkar et al., Nanocrystalline multicomponent entropy stabilised transition metal oxides, Journal of the European Ceramic Society 37, 747 (2016)
A. Sarkar et al., Rare earth and transition metal based entropy stabilised perovskite type oxides, Journal of the European Ceramic Society 9, 2318 (2018)
A. Sarkar et al., High–Entropy Oxides: Fundamental Aspects and Electrochemical Properties, Advanced Materials 31, 1806236 (2019)
A. Sarkar et al., Comprehensive investigation of crystallographic, spin-electronic and magnetic structure of (Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)3O4: Unraveling the suppression of configuration entropy in high entropy oxides, Acta Materialia 117581 (2022)
Synthesis and Fabrication
Synthesis and Fabrication
We develop ceramic materials via wet-chemistry, aerosol-based, and mechanochemical routes, and fabricate single-crystal thin films using pulsed laser deposition with precise control over composition and structure.
Selected Works:
Z. Zhao et al., A. Sarkar*, Strained single crystal high entropy oxide manganite thin films, Applied Physics Letters, 125, 011902 (2024)
M. R. Chellali, A. Sarkar* et al., On the homogeneity of high entropy oxides: An investigation at the atomic scale, Scripta Materialia 166, 58 (2019)
A. Sarkar* et al., Determining role of individual cations in high entropy oxides: Structure and reversible tuning of optical properties, Scripta Materialia 207, 114273 (2022)
Battery Materials
Battery Materials
Our group focuses on developing cobalt-free, low-nickel cathodes using earth-abundant elements for high energy density and long-term stability in lithium-ion batteries. In parallel, we design advanced solid-state electrolytes with high ionic conductivity and improved interfacial compatibility for all-solid-state batteries.
Selected Works:
A. Sarkar et al., High entropy oxides for reversible energy storage, Nature Communications 9, 3400 (2018)
Q. Wang, A. Sarkar et al., Multi-anionic and -cationic compounds: new high entropy materials for advanced Li-ion batteries, Energy & Environmental Science 12, 2433 (2019)
L. Lin, K. Wang, A. Sarkar et al., High–Entropy Sulfides as Electrode Materials for LiIon Batteries, Advanced Energy Materials 2103090 (2022)
Magnetic Materials
Magnetic Materials
Part of our group focuses on rare-earth-free ceramic magnets for electric motors and on the fundamental magneto-electronic properties of complex metal oxides, supporting sustainable energy technologies.
Selected Works:
A. Sarkar* et al., High entropy approach to engineer strongly correlated functionalities in manganites, Advanced Materials 35, 2207436 (2023)
Z. Zhao et al., A. Sarkar*, Strain-Driven Bidirectional Spin Orientation Control in Epitaxial High Entropy Oxide Films, Advanced Science, 202304038 (2023)
A. Sarkar* et al., Role of intermediate 4f states in tuning the band structure of high entropy oxides, APL Materials 8, 051111 (2020)
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