Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures
arXiv:1901.08894 · doi:10.1063/1.5090209
Abstract
We study the impact of Ga ion exposure on the local and non-local magnetotransport response in heterostructures of the ferrimagnetic insulator yttrium iron garnet and platinum. In particular, we cut the yttrium iron garnet layer in between two electrically separated wires of platinum using a Ga ion beam, and study the ensuing changes in the magnetoresistive response. We find that the non-local magnetoresistance signal vanishes when the yttrium iron garnet film between the Pt wires is fully cut, although the local spin Hall magnetoresistance signal remains finite. This observation corroborates the notion that pure spin currents carried by magnons are crucial for the non-local magnetotransport effects observed in magnetic insulator/metal nanostructures.
5 pages, 3 figures
References in corpus (8)
- Theory of spin Hall magnetoresistance
- Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
- Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer
- Negative spin Hall magnetoresistance of Pt on the bulk easy-plane antiferromagnet NiO
- Spin convertance at magnetic interfaces
- Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
- Dynamic phase diagram of dc-pumped magnon condensates
- Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance