High precision measurement of the spin waves in Yttrium Iron Garnet


Yttrium Iron Garnet (YIG) is a material with extremely wide ranging applications. It is a ferrimagnetic spinel with the narrowest ferromagnetic resonance linewidth of any known material. Despite decades of experiments on this material, data relating to its full magnon spectrum is sparse. The spectrum is known to contain 20 branches, but the most thorough work to date relies upon a 3-parameter hamiltonian derived from fitting just 3 (the only 3 that were observed in what is still the only INS measurement on this material). Increasing interest in YIG for applications in magnonics (the magnon equivalent of electronics) necessitates a direct measurement of the optical magnon modes, which are crucial for understanding and exploiting this material. We propose to take advantage of large single crystals that are commercially available and thoroughly map the entire excitation spectrum.

DOI https://doi.org/10.5286/ISIS.E.64745253
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/64745253
Creator Dr Russell Ewings; Professor Andrew Boothroyd; Dr Andrew Princep; Dr Alexy Karenowska
Publisher ISIS Neutron and Muon Source
Publication Year 2018
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Resource Type Dataset
Discipline Natural Sciences; Physics
Temporal Coverage Begin 2015-09-15T07:00:00Z
Temporal Coverage End 2015-09-16T07:00:00Z