Előadó: Andrew Goodwin (University of Oxford)
Előadás címe: Diffuse scattering studies of unconventional magnets
Dátum: 2024.03.05., 14:00
Helyszín: 1-es épület tanácsterem
Zoom: https://wigner-hu.zoom.us/j/86966499648?pwd=tQ4RjE9ighjcaIORorsGI7qBcMpaH9.1
Összefoglaló:
The incorporation of geometric frustration and/or low-dimensional motifs within magnetic materials can lead to a variety of unusual correlated spin structures that are intermediate to the random arrangement of paramagnets and the long-range periodic order of (anti)ferromagnets. Characteristic of such partial order is the presence of structured diffuse scattering in the neutron magnetic scattering function. This talk will discuss various methods for analysing this diffuse magnetic scattering, and will illustrate the insight it can provide into the unusual magnetic structures of a range of systems, including pyrochlore spin-ices [1], elemental Mn [2], garnets [3], and MnO [4]. The talk will conclude with a discussion of metal–organic framework chemistry as a route to new magnetic materials with unusual topologies [5] for application in magnetocaloric solid-state cooling.
[1] PRL 108, 017204 (2012)
[2] PRL 110, 267207 (2013)
[3] Science 350, 179 (2015)
[4] PRB 97, 014429 (2018)
[5] PRL 128, 177201 (2022)
