Thermal spin current generation in the multifunctional ferrimagnet Ga${}_{0.6}$Fe${}_{1.4}$O${}_3$

Abstract

In recent years, multifunctional materials have attracted increasing interest for magnetic memories and energy harvesting applications. Magnetic insulating materials are of special interest for this purpose, since they allow the design of more efficient devices due to the lower Joule heat losses. In this context, Ga${}_{0.6}$Fe${}_{1.4}$O${}_3$ (GFO) is a good candidate for spintronics applications, since it can exhibit multiferroicity and presents a spin Hall magnetoresistance similar to the one observed in a yttrium iron garnet (YIG)/Pt bilayer. Here, we explore GFO utilizing thermo-spin measurements in an on-chip approach. By carefully considering the geometry of our thermo-spin devices we are able to quantify the spin Seebeck effect and the spin current generation in a GFO/Pt bilayer, obtaining a value comparable to that of YIG/Pt. This further confirms the promises of an efficient spin current generation with the possibility of an electric-field manipulation of the magnetic properties of the system in an insulating ferrimagnetic material.

References in corpus (16)

• Spin Seebeck insulator
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
• Ultrafast magnetization switching by spin-orbit torques
• Thermoelectric generation based on spin Seebeck effects
• Sub-micrometer yttrium iron garnet LPE films with low ferromagnetic resonance losses
• Longitudinal spin Seebeck coefficient: heat flux vs. temperature difference method
• Thermoelectric performance of spin Seebeck effect in Fe3O4/Pt-based thin film heterostructures
• Voltage control of magnon spin currents in antiferromagnetic Cr2O3
• Observation of nuclear-spin Seebeck effect
• Charge-spin current conversion in high quality epitaxial Fe/Pt systems: isotropic spin Hall angle along different in-plane crystalline directions
• Spin Seebeck devices using local on-chip heating
• Distinguishing antiferromagnetic spin sublattices via the spin Seebeck effect
• Experimental evidence of spin-orbit torque from metallic interfaces
• Thermal conductance of thin film YIG determined using Bayesian statistics
• Spin current transport in hybrid Pt / multifunctional magnetoelectric Ga0.6Fe1.4O3 bilayers

Cited by in corpus (3)

• Spin-to-charge conversion by spin pumping in sputtered polycrystalline Bi${}_x$Se${}_{1-x}$
• Self-induced spin pumping and inverse spin Hall effect in single FePt thin films
• RF field characterization and rectification effects in spin pumping and spin-torque FMR for spin-orbitronics