Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance

Abstract

We study the influence of the interface quality of Pt/Y${}_3$Fe${}_5$O${}_{12}$(111) hybrids on their spin Hall magnetoresistance. This is achieved by exposing Y${}_3$Fe${}_5$O${}_{12}$(111) single crystal substrates to different well-defined surface treatments prior to the Pt deposition. The quality of the Y${}_3$Fe${}_5$O${}_{12}$(YIG) surface, the Pt/YIG interface and the Pt layer is monitored \textit{in-situ} by reflection high-energy electron diffraction and Auger electron spectroscopy as well as \textit{ex-situ} by atomic force microscopy and x-ray diffraction. To identify the impact of the different surface treatments on the spin Hall magnetoresistance, angle-dependent magnetoresistance measurements are carried out at room temperature. The largest spin Hall magnetoresistance is found in Pt/YIG fabricated by a two-step surface treatment consisting of a "piranha" etch process followed by an annealing step at $500^{\circ }$C in pure oxygen atmosphere. Our data suggest that the small SMR in Pt/YIG without any surface treatments of the YIG substrate prior to Pt deposition is caused by a considerable carbon agglomeration at the Y${}_3$Fe${}_5$O${}_{12}$ surface.

References in corpus (11)

• Spin Hall effect
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Theory of spin Hall magnetoresistance
• Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
• Finite-element theory of transport in ferromagnet-normal metal systems
• Experimental test of the spin mixing interface conductivity concept
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Spin mixing conductance at a well-controlled platinum/yttrium iron garnet interface
• Optimization of the yttrium iron garnet/platinum interface for spin pumping-based applications
• Influence of interface condition on spin-Seebeck effects
• Advances in single crystal growth and annealing treatment of electron-doped HTSC

Cited by in corpus (18)

• Negative spin Hall magnetoresistance of Pt on the bulk easy-plane antiferromagnet NiO
• Spin waves in coupled YIG/Co heterostructures
• Probing Magnetism in Insulating Cr2Ge2Te6 by Induced Anomalous Hall Effect in Pt
• Magnetoresistance in Hybrid Pt/CoFe2O4 Bilayers Controlled by Competing Spin Accumulation and Interfacial Chemical Reconstruction
• Spin-orbit torque and spin pumping in YIG/Pt with interfacial insertion layers
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Orbital Pumping in Ferrimagnetic Insulators
• Current direction anisotropy of the spin Hall magnetoresistance in nickel ferrite thin films with bulk-like magnetic properties
• Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ and inverted Y${}_3$Fe${}_5$O${}_{12}$/Pt bilayers
• Spin-Hall-Active Platinum Thin Films Grown Via Atomic Layer Deposition
• Spin Hall magnetoresistance effect from a disordered interface
• Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures
• Enhancement of YIG$|$Pt spin conductance by local Joule annealing
• Bias dependent spin injection into graphene on YIG through bilayer hBN tunnel barriers
• Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
• Statistical characterization of the spin Hall magnetoresistance in YIG/Pt heterostructures
• Disambiguating electrical detection of magnetization dynamics in magnetic insulators
• Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe${}_2$O${}_4$ bilayers