35 citations · 181 across the 20 of their papers we have counts for
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Epitaxial Oxide Thin Films with High Entropy and Anomalous Crystallinity
Joseph Petruska, Christina M. Rost, Jon-Paul Maria +1
Pulsed laser deposition (PLD) expands the compositional and structural possibilities of high-entropy oxide (HEO) thin films through far-from-equilibrium growth and kinetic arrest o…
Jahn-Teller Distortion-Driven Lattice Parameter Tunability in Coherent High-Entropy Oxide Thin Films
Dhiya Srikanth, Joseph Petruska, Matthew Furst +3
Here, we isolate how Cu concentration and Jahn-Teller distortions control the out-of-plane lattice parameter of pseudomorphic MgCoNiCuZnO-derived high-entropy oxide films on MgO. W…
Ionic Diffusion Properties of Rare-Earth High-Entropy Oxides from a Machine-Learned Interatomic Potential
Mary Kathleen Caucci, Billy E. Yang, Saeed S. I. Almishal +2
Rare-earth high-entropy oxides (RE-HEOs) have emerged as a promising class of functional ceramics for solid-state electrochemical applications due to their chemical complexity, str…
Hydrothermally-Assisted Sintering of Calcium Hydroxide Sputtering Targets: A Route to Quantum-Grade CaO Thin Films
Jake A. DeChiara, Tainara Coutinho, Saeed S. I. Almishal +1
In this report we demonstrate dense polycrystalline calcium hydroxide ceramics fabricated by hydrothermally-assisted sintering - often referred to as cold-sintering - to produce hi…
Quantifying the coupling between strain and cation valence in high entropy oxide thin films using electron microscopy
Sai Venkata Gayathri Ayyagari, Saeed SI Almishal, Debangshu Mukherjee +3
High entropy oxides (HEOs) are a class of materials with vast compositional space and tunable properties, making them attractive for applications in thermoelectrics, magnetism, ion…
Anomalous Crystallinity and Magnetism in Chemically Disordered Coherent Heterostructures
Saeed S. I. Almishal, Sai Venkata Gayathri Ayyagari, Aaron Pearre +9
High-entropy oxide (HEO) thin films uniquely superimpose exceptional chemical disorder with exceptional crystalline quality and coherence - an intersection we term anomalous crysta…
Ferroelectric dynamic-field-driven nucleation and growth model for predictive materials-to-circuit co-design
Yi Liang, Soohyeon Kim, Tony Chiang +8
Real ferroelectric devices operate under mixed and distorted time-varying voltages, yet the standard nucleation-growth frameworks used to interpret ferroelectric switching - most n…
Compositional and Oxygen-Vacancy Effects on Phase Stability and Electronic Properties in Ceria-Based Lanthanide High-Entropy Oxides
Mary Kathleen Caucci, Billy E. Yang, Gerald R. Bejger +5
Cerium-based lanthanide high-entropy oxides (LN-HEOs) are promising candidates for solid-state electrolyte (mass transport) applications due to their ability to accommodate high co…
Resolving Structural Transitions in Lanthanide High-Entropy Oxides
Billy E. Yang, Saeed S. I. Almishal, Sai Venkata Gayathri Ayyagari +6
We report a temperature-composition phase diagram for the chemically disordered and CeO2-LA2O3 high entropy oxides (HEOs), where LA denotes equimolar Y, La, Sm, and Pr, delineating…
Exploring Cation Selection and Disorder within Entropy-Driven O (=Zr/Hf, =Nb/Ta) Oxides
Jacob T. Sivak, R. Jackson Spurling, Jon-Paul Maria +1
We investigate the local atomic and electronic structure, thermodynamic stability, and defect chemistry of O ( = Zr/Hf, = Nb/Ta) oxides using first-princi…
Exploring the Complex Landscape of Entropy Stabilized Oxides
Bo Jiang, De-Ye Lin, Gerald R. Bejger +6
Entropy-stabilized oxides (ESOs), driven by high configurational entropy, have gained phenomenological research interest due to their potential for tailoring structure property rel…
Maximizing solubility in rock salt high-entropy oxides
Matthew Furst, Joseph Petruska, Dhiya Srikanth +5
To explore and quantitatively map the cation-size mismatch solubility limits in high-entropy oxides (HEOs), we report on Ca substitution in prototypical MgCoNiCuZnO, because…
Lanthanide L-Edge Spectroscopy of High-Entropy Oxides: Insights into Valence and Phase Stability
Gerald R. Bejger, Mary Kathleen Caucci, Saeed S. I. Almishal +4
High-entropy oxides (HEOs) are a promising class of multicomponent ceramics with tunable structural and electronic properties. In this study, we investigate the local electronic st…
Thermodynamics-Inspired High-Entropy Oxide Synthesis
Saeed S. I. Almishal, Matthew Furst, Yueze Tan +8
High-entropy oxide (HEO) thermodynamics transcend temperature-centric approaches, spanning a multidimensional landscape where oxygen chemical potential plays a decisive role. Here,…
Chemically-Disordered Transparent Conductive Perovskites with High Crystalline Fidelity
Saeed S. I. Almishal, Pat Kezer, Yasuyuki Iwabuchi +16
This manuscript presents a working model linking chemical disorder and transport properties in correlated-electron perovskites with high-entropy formulations and a framework to act…
Performance of Exchange-Correlation Approximations to Density-Functional Theory for Rare-earth Oxides
Mary Kathleen Caucci, Jacob T. Sivak, Saeed S. I. Almishal +4
Rare-earth oxides (REOs) are an important class of materials owing to their unique properties, including high ionic conductivities, large dielectric constants, and elevated melting…
Discovering High-Entropy Oxides with a Machine-Learning Interatomic Potential
Jacob T. Sivak, Saeed S. I. Almishal, Mary K. Caucci +7
High-entropy materials shift the traditional materials discovery paradigm to one that leverages disorder, enabling access to unique chemistries unreachable through enthalpy alone.…
Local structure maturation in high entropy oxide (Mg,Co,Ni,Cu,Zn)1-x(Cr,Mn)xO thin films
Gabriela E. Niculescu, Gerald R. Bejger, John P. Barber +8
High entropy oxides (HEO)s have garnered much interest due to their available high degree of tunability. Here, we study the local structure of (MgNiCuCoZn)0.167(MnCr)0.083O, a comp…
Untangling individual cation roles in rock salt high-entropy oxides
Saeed S. I. Almishal, Jacob T. Sivak, George N. Kotsonis +10
We unravel the distinct roles each cation plays in phase evolution, stability, and properties within Mg1/5Co1/5Ni1/5Cu1/5Zn1/5O high-entropy oxide (HEO) by integrating experimental…
Order evolution from a high-entropy matrix: understanding and predicting paths to low temperature equilibrium
Saeed S. I. Almishal, Leixin Miao, Yueze Tan +9
Interest in high-entropy inorganic compounds originates from their ability to stabilize cations and anions in local environments that rarely occur at standard temperature and press…
Coexistence and interplay of two ferroelectric mechanisms in Zn1-xMgxO
Jonghee Yang, Anton V. Ievlev, Anna N. Morozovska +7
Ferroelectric materials promise exceptional attributes including low power dissipation, fast operational speeds, enhanced endurance, and superior retention to revolutionize informa…
Strain fluctuations unlock ferroelectricity in wurtzites
Steven M. Baksa, Simon Gelin, Seda Oturak +8
Ferroelectrics are of practical interest for non-volatile data storage due to their reorientable, crystallographically defined polarization. Yet efforts to integrate conventional f…