Professor John Evans' Outputs (3)

Displacive Jahn–Teller Transition in NaNiO 2 (2024)
Journal Article
Nagle-Cocco, L. A. V., Genreith-Schriever, A. R., Steele, J. M. A., Tacconis, C., Bocarsly, J. D., Mathon, O., Neuefeind, J. C., Liu, J., O’Keefe, C. A., Goodwin, A. L., Grey, C. P., Evans, J. S. O., Dutton, S. E., Nagle-Cocco, L. A. V., Steele, J. M. A., Neuefeind, J. C., Goodwin, A. L., Grey, C. P., & Dutton, S. E. (2024). Displacive Jahn–Teller Transition in NaNiO 2. Journal of the American Chemical Society, 146(43), 29560-29574. https://doi.org/10.1021/jacs.4c09922

Below its Jahn–Teller transition temperature, T JT, NaNiO2 has a monoclinic layered structure consisting of alternating layers of edge-sharing NaO6 and Jahn–Teller-distorted NiO6 octahedra. Above T JT where NaNiO2 is rhombohedral, diffraction measure... Read More about Displacive Jahn–Teller Transition in NaNiO 2.

Local Structure and Dynamics in MPt(CN) 6 Prussian Blue Analogues (2024)
Journal Article
Harbourne, E., Barker, H., Guéroult, Q., Cattermull, J., Nagle-Cocco, L. A. V., Roth, N., Evans, J. S. O., Keen, D. A., & Goodwin, A. L. (2024). Local Structure and Dynamics in MPt(CN) 6 Prussian Blue Analogues. Chemistry of Materials, 36(11), 5796-5804. https://doi.org/10.1021/acs.chemmater.4c01013

We use a combination of X-ray pair distribution function (PDF) measurements, lattice dynamical calculations, and ab initio density functional theory (DFT) calculations to study the local structure and dynamics in various MPt­(CN)6 Prussian blue analo... Read More about Local Structure and Dynamics in MPt(CN) 6 Prussian Blue Analogues.

Structural dynamics of first-order phase transition in giant magnetocaloric La(Fe,Si)13: The free energy landscape (2024)
Journal Article
Beleza, A. A., Pires, B., Almeida, R., Evans, J. S. O., dos Santos, A. M., Frontzek, M., …Belo, J. H. (2024). Structural dynamics of first-order phase transition in giant magnetocaloric La(Fe,Si)13: The free energy landscape. Materials Today Physics, 42, Article 101388. https://doi.org/10.1016/j.mtphys.2024.101388

Maximizing the performance of magnetic refrigerators and thermomagnetic energy harvesters is imperative for their successful implementation and can be done by maximizing their operation frequency. One of the features delimiting the frequency and effi... Read More about Structural dynamics of first-order phase transition in giant magnetocaloric La(Fe,Si)13: The free energy landscape.