Magnon diffusion in the spin Seebeck material magnetite
Utilising waste heat from industrial processes has the potential to increase efficiency and decrease greenhouse emissions. Thermoelectric generators (TEG) are a reliable form of waste heat recovery. For good device efficiency the thermal and electrical conductivities of a TEG needs to minimised and maximised respectively. But, these parameters are intrinsically linked for a given material and thus provide an ultimate efficiency limit. The spin Seebeck effect (SSE) is a recently discovered spintronic phenomenon and may provide a way of sidestepping this limit. SSE devices, however, saturate above a critical thickness limiting their performance. It has been theorised that this saturation length corresponds to the magnon diffusion length. We wish to use inelastic neutron scattering to measure the magnon lifetimes in Fe3O4 and thus deduce the magnon diffusion length. Our results will provide a key test of theory in this rapidly developing field and inform future device design.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
A. J. Caruana; C D W Cox; K Morrison; PIOVANO Andrea and VONESHEN David. (2018). Magnon diffusion in the spin Seebeck material magnetite. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1576
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.