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Machine Learning Guided Discovery of Corundum High Entropy Oxides
Abraham A. Mancilla, Oliver A. Dicks, Solveig S. Aamlid +5
Early thinking in the field of high entropy oxides (HEOs) emphasized their likely abundance, with combinatorial arguments hinting at a myriad of new materials. The experimental rea…
Disentangling the contributions of individual cations to magnetic order in a spinel high entropy oxide
Mario Ulises González-Rivas, Chun-Fu Chang, Martin Bluschke +8
High entropy oxides (HEOs) can possess long-range ordered magnetic states despite their extreme chemical disorder. Very little is known about how the different chemical constituent…
More is different: How chemical complexity influences stability in high entropy oxides
Ksenia Khoroshun, Mario U. González-Rivas, Alannah M. Hallas
Tailoring the chemical composition of a high entropy oxide (HEO) is a powerful approach to enhancing desirable material properties. However, the targeted synthesis of HEO materials…
Coherent high-velocity chiral magnons in the metallic altermagnet CrSb
Ashutosh K. Singh, Niclas Heinsdorf, Abraham A. Mancilla +8
We report the collective magnetism of the metallic altermagnet CrSb. Magnetic susceptibility and polarized neutron diffraction measurements show that CrSb is a perfectly compensate…
Expanding the search space of high entropy oxides and predicting synthesizability using machine learning interatomic potentials
Oliver A. Dicks, Solveig S. Aamlid, Alannah M. Hallas +1
We propose an efficient computational methodology for predicting the synthesizability of high entropy oxides (HEOs) in a large space of possible candidate compounds. HEOs are a gro…
Intrinsic defect intolerance in the ultra-pure metal PtSn
Samikshya Sahu, Dong Chen, Niclas Heinsdorf +6
Ultra-pure materials are highly valued as model systems for the study of intrinsic physics. Frequently, however, the crystal growth of such pristine samples requires significant op…
The origin and scarcity of breathing pyrochlore lattices in spinel oxides
Valentina Mazzotti, Solveig S. Aamlid, Abraham A. Mancilla +5
Breathing pyrochlores are a unique class of materials characterized by a three-dimensional lattice of corner-sharing tetrahedra. However, unlike conventional pyrochlores where all…
Impact of synthesis method on the structure and function of high entropy oxides
Mario U. González-Rivas, Solveig S. Aamlid, Megan R. Rutherford +9
The term sample dependence describes the troublesome tendency of nominally equivalent samples to exhibit different physical properties. High entropy oxides (HEOs) are a class of ma…
Tetragonal BaCoO: A Co Ferromagnetic Mott Insulator with Inverted Spin Crossover
Mingyu Xu, Haozhe Wang, Krishna Prasad Koirala +13
The interplay between crystal electric field splitting of d states and Hund's rule exchange energy in cobalt-based perovskites offers a promising avenue for inducing spin-state tra…
Effect of high pressure synthesis conditions on the formation of high entropy oxides
Solveig Stubmo Aamlid, Minu Kim, Mario U. González-Rivas +3
High entropy materials are often entropy stabilized, meaning that the configurational entropy from multiple elements sharing a single lattice site stabilizes the structure. In this…
Short-range order and local distortions in entropy stabilized oxides
Solveig S. Aamlid, Sam Mugiraneza, Mario U. González-Rivas +3
An idealized high entropy oxide is characterized by perfect chemical disorder and perfect positional order. In this work, we investigate the extent to which short-range order (SRO)…
Phase stability of entropy stabilized oxides with the -PbO structure
Solveig S. Aamlid, Graham H. J. Johnstone, Sam Mugiraneza +3
The prediction of new high entropy oxides (HEOs) remains a profound challenge due to their inherent chemical complexity. In this work, we combine experimental and computational met…
Symmetry-mode analysis for local structure investigations using pair distribution function data
Parker K. Hamilton, Jaime M. Moya, Alannah M. Hallas +3
Symmetry-adapted distortion modes provide a natural way to describe distorted structures derived from higher-symmetry parent phases. Structural refinements using symmetry-mode ampl…
Understanding the role of entropy in high entropy oxides
Solveig S. Aamlid, Mohamed Oudah, Jörg Rottler +1
The field of high entropy oxides (HEOs) flips traditional materials science paradigms on their head by seeking to understand what properties arise in the presence of profound confi…
Entropy engineering and tunable magnetic order in the spinel high entropy oxide
Graham H. J. Johnstone, Mario U. González-Rivas, Keith M. Taddei +5
Spinel oxides are an ideal setting to explore the interplay between configurational entropy, site selectivity, and magnetism in high entropy oxides. In this work we characterize th…
Tutorial: A Beginner's Guide to Interpreting Magnetic Susceptibility Data with the Curie-Weiss Law
Sam Mugiraneza, Alannah M. Hallas
Magnetic susceptibility measurements are often the first characterization tool that researchers turn to when beginning to assess the magnetic nature of a newly discovered material.…
Nonsymmorphic Symmetry-Protected Band Crossings in a Square-Net Metal PtPb
Han Wu, Alannah M. Hallas, Xiaochan Cai +15
Topological semimetals with symmetry-protected band crossings have emerged as a rich landscape to explore intriguing electronic phenomena. Nonsymmorphic symmetries in particular ha…
Liquid-like correlations in single crystalline Y2Mo2O7: an unconventional spin glass
H. J. Silverstein, K. Fritsch, F. Flicker +15
The spin glass behavior of Y2Mo2O7 has puzzled physicists for nearly three decades. Free of bulk disorder within the resolution of powder diffraction methods, it is thought that th…