Observation of Spin Nernst effect in Platinum
arXiv:1704.06788 · doi:10.1063/1.5021731
Abstract
Central focus of spintronics is concentrated on generation of pure spin current and associated spin torque. Pure spin current can be generated by spin Hall effect in heavy metals by passing charge current. By spin Seebeck effect pure spin current can also be generated in ferromagnet. In this work we experimentally demonstrate that if heavy metals like Platinum with high spin orbit coupling carry heat current it can convert it into spin current due to relativistic spin orbit interaction. This conversion of heat current into spin current in non magnet is equivalent of thermally driven spin Hall effect or it is known as spin Nernst effect. We observed spin Nernst effect in Ni/Pt bi-layer experimentally and we confirm that when Pt is replaced by low spin orbit material like Al spin Nernst effect significantly reduces. So we have detected spin Nernst effect unambiguously and compare its strength with electrical spin Hall effect.
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- Control of magnetization dynamics by spin Nernst torque
- First harmonic measurements of the spin Seebeck effect
- Thermal effects in spintronic materials and devices: an experimentalist's guide
- Large anomalous Nernst effect across the magneto-structural transition in bulk Ni-Co-Mn-Sn full Heusler alloy
- Origins of transverse voltages generated by applied thermal gradients and applied electric fields in ferrimagnetic-insulator/heavy-metal bilayers
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- Evidence of magnetoelectronic electromagnon mediated transport in flexoelectronic heterostructures
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- Large Spin Nernst Effect in Ni70Cu30 Alloy