Ferromagnetic resonance phase imaging in spin Hall multilayers

Abstract

We experimentally image the magnetic precession phase of patterned spin Hall multilayer samples to study the rf driving field vector using time-resolved anomalous Nernst effect (TRANE) microscopy. Our ferromagnetic resonance (FMR) measurements quantify the phase and amplitude for both the magnetic precession and the electric current, which allows us to establish the total driving field orientation and the strength of spin Hall effect. In a channel of uniform width, we observe spatial variation of the FMR phase laterally across the channel. We interpret our findings in the context of electrical measurement using the spin-transfer torque ferromagnetic resonance technique and show that observed phase variation introduces a systematic correction into the spin Hall angle if spatial phase and amplitude variations are not taken into account.

6 pages, 7 figures

References in corpus (8)

• Spin Transfer Torques
• Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
• Comparison of spin-orbit torques and spin pumping across NiFe/Pt and NiFe/Cu/Pt interfaces
• Enhancement of the Anti-Damping Spin Torque Efficacy of Platinum by Interface Modification
• Mode- and size-dependent Landau-Lifshitz damping in magnetic nanostructures: Evidence for non-local damping
• All electrical manipulation of magnetization dynamics in a ferromagnet by antiferromagnets with anisotropic spin Hall effects
• Ferromagnetic resonance force spectroscopy of individual sub-micron size samples
• Current-induced spin torque resonance of magnetic insulators

Cited by in corpus (4)

• Spin Seebeck imaging of spin-torque switching in antiferromagnetic Pt/NiO heterostructures
• Imaging uncompensated moments and exchange-biased emergent ferromagnetism in FeRh thin films
• Nanoscale magnetization and current imaging using scanning-probe magneto-thermal microscopy
• Dynamic detection of current-induced spin-orbit magnetic fields: a phase independent approach