Giant magneto-spin-Seebeck effect and magnon transfer torques in insulating spin valves
AffiliationUniv Arizona, Dept Phys
MetadataShow full item record
PublisherAMER INST PHYSICS
CitationGiant magneto-spin-Seebeck effect and magnon transfer torques in insulating spin valves 2018, 112 (5):052405 Applied Physics Letters
JournalApplied Physics Letters
RightsRights managed by AIP Publishing.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractWe theoretically study magnon transport in an insulating spin valve (ISV) made of an antiferromagnetic insulator sandwiched between two ferromagnetic insulator (FI) layers. In the conventional metal-based spin valve, the electron spins propagate between two metallic ferromagnetic layers, giving rise to giant magnetoresistance and spin transfer torque. Here, the incoherent magnons in the ISV serve as angular momentum carriers and are responsible for the angular momentum transport between two FI layers across the antiferromagnetic spacer. We predict two transport phenomena in the presence of the temperature gradient: a giant magneto-spin-Seebeck effect in which the output voltage signal is controlled by the relative orientation of the two FI layers and magnon transfer torque that can be used for switching the magnetization of the FI layers with a temperature gradient of the order of 0.1 Kelvin per nanometer. Published by AIP Publishing.
Note12 month embargo; published online: 31 January 2018
VersionFinal published version
SponsorsU.S. National Science Foundation [ECCS-1708180]