Control of magnetization dynamics by spin Nernst torque

Abstract

Control of magnetization dynamics is one of the primary goals in spintronics. It has been demonstrated using spin Hall effect i.e charge current to spin current conversion in non-magnetic metal which has large spin-orbit coupling such as Pt, W etc. Recently different groups have shown generation of spin current in Pt, W while thermal gradient is created by virtue of spin Nernst effect. In this work we show the evidence of magnetization control by spin Nernst torque in Pt/Py bi-layer. We compared relative strength of spin Nernst Torque and spin Hall torque by measuring the systematic variation of magnetic linewidth on application of constant heat or charge current. Spin-torque ferromagnetic resonance (ST-FMR) technique is adopted to excite the magnet and to measure line-width precisely from the symmetric and anti-symmetric voltage component. Control of magnetization dynamics by spin Nernst torque will emerge as an alternative way to manipulate nano-magnets.

References in corpus (19)

• Spin Caloritronics
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
• Thermally driven spin injection from a ferromagnet into a non-magnetic metal
• Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices
• Seebeck Effect in Magnetic Tunnel Junctions
• Observation of the spin Nernst effect
• Transverse spin Seebeck vs. Anomalous and Planar Nernst Effects in Permalloy Thin Films
• The Spin Nernst effect in Tungsten
• Evidence for thermal spin transfer torque
• Spin torque and Nernst effects in Dzyaloshinskii-Moriya ferromagnets
• Giant thermal spin torque assisted magnetic tunnel junction switching
• Observation of anomalous spin-torque generated by a ferromagnet
• Heat-induced damping modification in YIG/Pt hetero-structures
• Observation of Spin Nernst effect in Platinum
• Spin-orbit torques in L1${}_0$-FePt/Pt thin films driven by electrical and thermal currents
• Sign reversal of field like spin-orbit torque in ultrathin Chromium/Nickel bilayer
• Domain wall magneto-Seebeck effect
• Integer, fractional and side band injection locking of spintronic feedback nano-oscillator to microwave signal

Cited by in corpus (2)

• Origins of transverse voltages generated by applied thermal gradients and applied electric fields in ferrimagnetic-insulator/heavy-metal bilayers
• Enhancement of Thermal Spin Transfer Torque via Bandpass Energy Filtering