Microwave-induced spin currents in ferromagnetic-insulator|normal-metal bilayer system

Abstract

A microwave technique is employed to simultaneously examine the spin pumping and the spin Seebeck effect processes in a YIG|Pt bilayer system. The experimental results show that for these two processes, the spin current flows in opposite directions. The temporal dynamics of the longitudinal spin Seebeck effect exhibits that the effect depends on the diffusion of bulk thermal-magnons in the thermal gradient in the ferromagnetic-insulator|normal-metal system.

4 pages, 4 figures

References in corpus (14)

• Spin Caloritronics
• Spin pumping and magnetization dynamics in metallic multilayers
• Theory of magnon-driven spin Seebeck effect
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Spin pumping by parametrically excited exchange magnons
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• Magnon, phonon and electron temperature profiles and the spin Seebeck effect in magnetic insulator/normal metal hybrid structures
• Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
• Magnon-phonon coupling unmasked: a direct measurement of magnon temperature
• Current heating induced spin Seebeck effect
• Propagation of Thermally Induced Magnonic Spin Currents
• Sub-microsecond fast temporal evolution of the spin Seebeck effect
• Temporal behavior of the inverse spin Hall voltage in a magnetic insulator-nonmagnetic metal structure
• Heat-induced damping modification in YIG/Pt hetero-structures

Cited by in corpus (13)

• Thermoelectric generation based on spin Seebeck effects
• Determination of the origin of the spin Seebeck effect - bulk vs. interface effects
• Spin colossal magnetoresistance in an antiferromagnetic insulator
• Magnon-phonon interactions in magnon spintronics
• Large spin-wave bullet in a ferrimagnetic insulator driven by spin Hall effect
• Spin-transfer torque based damping control of parametrically excited spin waves in a magnetic insulator
• Spin Seebeck effect at microwave frequencies
• Long lifetime of thermally-excited magnons in bulk yttrium iron garnet
• Hall detection of a ppm spin polarization
• Spin Seebeck effect and ballistic transport of quasi-acoustic magnons in room-temperature yttrium iron garnet films
• Role of magnons and the size effect in heat transport through an insulating ferromagnet/insulator interface
• Detection of spin pumping from YIG by spin-charge conversion in a Au/Ni${}_{80}$Fe${}_{20}$ spin-valve structure
• Steering light with magnetic textures