| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Current Trends in Magnetocaloric Materials: An FMD Symposium in Honor of Ekkes Brueck
|
| Presentation Title |
Giant Barocaloric Effect at the Spin Crossover Transition of a Molecular Crystal |
| Author(s) |
Steven P. Vallone, Anthony N. Tantillo, António M. dos Santos, Jamie J. Molaison, Rafal Kulmaczewski, Antonin Chapoy, Pezhman Ahmadi, Malcolm A. Halcrow, Karl G. Sandeman |
| On-Site Speaker (Planned) |
António M. dos Santos |
| Abstract Scope |
Spin crossover occurs in compounds where the crystal field splitting of d-orbitals associated with a magnetic moment is of the order of kBT. As a result, a change of state from low spin (LS) to high spin (HS) can occur at the so-called spin crossover temperature, TSCO. Crucially for caloric applications, the change of state from LS to HS can be either continuous or first order, and it can occur at temperatures up to and beyond room temperature. This makes SCO transitions of interest for caloric cooling applications. Since SCO compounds are paramagnets or diamagnets, the largest caloric effects will be barocaloric rather than magnetocaloric.
In this presentation, we provide the first direct experimental demonstration of a giant, low pressure barocaloric effect (BCE) and outline future research directions for the development and optimization of the BCE associated with spin crossover. |
| Proceedings Inclusion? |
Undecided |