Crystal field effects on spin pumping

Abstract

"Spin pumping" is the injection of spin angular momentum by a time-dependent magnetization into an adjacent normal metal proportional to the spin mixing conductance. We study the role of electrostatic interactions in the form of crystal fields on the pumped spin currents generated by insulators with exchange-coupled local moments at the interface to a metal. The crystal field is shown to render the spin currents anisotropic, which implies that the spin mixing conductance of insulator|normal metal bilayers depends on crystal cut and orientation. We interpret the interface "effective field" (imaginary part of the spin mixing conductance) in terms of the coherent motion of the equilibrium spin density induced by proximity in the normal metal.

8 pages+, 7 figures

References in corpus (12)

• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Theory of spin Hall magnetoresistance
• Theory of the Spin Seebeck Effect
• Spin pumping and spin-transfer torques in antiferromagnets
• Experimental test of the spin mixing interface conductivity concept
• First-principles study of magnetization relaxation enhancement and spin-transfer in thin magnetic films
• Spin transfer torque on magnetic insulators
• Superfluid spin transport through antiferromagnetic insulators
• Gilbert Damping in Magnetic Multilayers
• Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects
• Spin Seebeck Power Conversion
• Lindhard function of a d-dimensional Fermi gas

Cited by in corpus (15)

• Crystal-field effects in graphene with interface-induced spin-orbit coupling
• Experimental Evidence of Non-Negligible Imaginary Part of Spin Mixing Conductance and Its Impact on Magnetization Dynamics in Heavy-Metal|Ferromagnet Bilayers
• Non-Contact Spin Pumping by Microwave Evanescent Fields
• Adiabatic limit of RKKY range function in one dimension
• Effects of screened Coulomb interaction on spin transfer torque
• Voltage-control of damping constant in magnetic-insulator/topological-insulator bilayers
• Effect of interfacial spin mixing conductance on gyromagnetic ratio of Gd substituted Y${}_3$Fe${}_5$O${}_{12}$
• Antiferromagnetic spin pumping via hyperfine interaction
• Enhancement of spin mixing conductance by $s$-$d$ orbital hybridization in heavy metals
• Electrically controllable exchange bias via interface magnetoelectric effect
• Enhancement of thermal spin pumping by orbital angular momentum of rare earth iron garnet
• Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
• Equilibrium current vortices in rare-earth-doped simple metals
• Spin-orbit torque on nuclear spins exerted by a spin accumulation via hyperfine interactions
• Crystal orientation dependent spin pumping in Bi0.1Y2.9Fe5O12/Pt interface