Relaxation mechanism driven by spin angular momentum absorption throughout antiferromagnetic phase transition in NiFe surface oxides

Abstract

We report an alternative mechanism for the physical origin of the temperature-dependent ferromagnetic relaxation of Permalloy (NiFe) thin films. Through spin-pumping experiments, we demonstrate that the peak in the temperature-dependence of NiFe damping can be understood in terms of enhanced spin angular momentum absorption at the magnetic phase transition in antiferromagnetic surface-oxidized layers. These results suggest new avenues for the investigation of an incompletely-understood phenomenon in physics.

References in corpus (4)

• Spin Transfer Torques
• Identification of the dominant precession damping mechanism in Fe, Co, and Ni by first-principles calculations
• Enhanced DC Spin Pumping into a Fluctuating Ferromagnet near Tc
• Temperature dependent dynamic and static magnetic response in magnetic tunnel junctions with Permalloy layers

Cited by in corpus (2)

• Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states
• Influences of interfacial oxidization on surface magnetic energy, magnetic damping and spin-orbit-torques in Pt / ferromagnet / capping structures