Spin-dependent Seebeck effect in non-local spin valve devices
arXiv:1811.06112 · doi:10.1063/1.4717752
Abstract
We performed measurements of Py/Cu and Py/Ag lateral spin valves as function of injection current direction and magnitude. Above a 'critical' current, there is an unexpected dependence of spin injection on current direction. Positive currents show higher polarization of spin injection than negative. This implies that in addition to current-induced spin injection, there is a thermally induced injection from a spin-dependent Seebeck effect. A temperature gradient in the Py electrode, caused by Joule heating, is responsible for injecting excess spins into the non-magnetic channel. This effect has important consequences for understanding high-current spin-based devices, such as spin transfer torque devices.
10 pages, 4 figures
References in corpus (5)
- Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
- Thermal Spin-Transfer Torques in Magnetoelectronic Devices
- Control of spin injection by direct current in lateral spin valves
- Current-voltage characteristics of semiconductor/ferromagnet junctions in the spin blockade regime
- Spin blockade at semiconductor/ferromagnet junctions
Cited by in corpus (14)
- Thermoelectric spin voltage in graphene
- Large room temperature spin-to-charge conversion signals in a few-layer graphene/Pt lateral heterostructure
- Multifunctional Spin Logic Gates In Graphene Spin Circuits
- Spin diffusion length of Permalloy using spin absorption in lateral spin valves
- Thermographic measurements of spin-current-induced temperature modulation in metallic bilayers
- Verification of the Thomson-Onsager reciprocity relation for spin caloritronics
- Spin-dependent thermoelectric effects in transport through a nanoscopic junction involving spin impurity
- Theory of Kondo suppression of spin polarization in nonlocal spin valves
- Thermal effects in spintronic materials and devices: an experimentalist's guide
- Local injection of pure spin current generates electric current vortices
- An alternative to the spin-coupled interface resistance for describing heat generation
- Mechanisms of spin-dependent heat generation in spin valves
- Anomalous and Planar Nernst effects in thin-films of half-metallic ferromagnet La2/3Sr1/3MnO3
- About the two spin-channel model for ferromagnetic excitations and spin-dependent heat transfer equations