Control of spin current by a magnetic YIG substrate in NiFe/Al nonlocal spin valves

Abstract

We study the effect of a magnetic insulator (Yttrium Iron Garnet - YIG) substrate on the spin transport properties of Ni${}_{80}$Fe${}_{20}$/Al nonlocal spin valve (NLSV) devices. The NLSV signal on the YIG substrate is about 2 to 3 times lower than that on a non magnetic SiO${}_2$ substrate, indicating that a significant fraction of the spin-current is absorbed at the Al/YIG interface. By measuring the NLSV signal for varying injector-to-detector distance and using a three dimensional spin-transport model that takes spin current absorption at the Al/YIG interface into account we obtain an effective spin-mixing conductance $G_{\uparrow \downarrow }\simeq 5-8\times 10^{13}{\Omega }^{-1}$m${}^{-2}$. We also observe a small but clear modulation of the NLSV signal when rotating the YIG magnetization direction with respect to the fixed spin polarization of the spin accumulation in the Al. Spin relaxation due to thermal magnons or roughness of the YIG surface may be responsible for the observed small modulation of the NLSV signal.

arXiv comment9 pages, 6 figures, including supplementary information

References in corpus (18)

• Spin Seebeck insulator
• Theory of spin Hall magnetoresistance
• Theory of magnon-driven spin Seebeck effect
• Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
• Experimental test of the spin mixing interface conductivity concept
• Spin injection and spin accumulation in all-metal mesoscopic spin valves
• Spin-Hall Magnetoresistance in Platinum on Yttrium Iron Garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization
• Observation of the spin Peltier effect
• Spin transfer torque on magnetic insulators
• Magnon, phonon and electron temperature profiles and the spin Seebeck effect in magnetic insulator/normal metal hybrid structures
• Spin mixing conductance at a well-controlled platinum/yttrium iron garnet interface
• Platinum thickness dependence of the inverse spin-Hall voltage from spin pumping in a hybrid YIG/Pt system
• Interplay of Peltier and Seebeck effects in nanoscale nonlocal spin valves
• Frequency and power dependence of spin-current emission by spin pumping in a thin film YIG/Pt system
• Spin heat accumulation and spin-dependent temperatures in nanopillar spin valves
• Thermal spin transport and spin-orbit interaction in ferromagnetic/non-magnetic metals
• Modulation of pure spin currents with a ferromagnetic insulator
• Spin torque and waviness in magnetic multilayers: a bridge between Valet-Fert theory and quantum approaches

Cited by in corpus (16)

• Theory of spin Hall magnetoresistance (SMR) and related phenomena
• Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures
• Spin Injection and Detection via the Anomalous Spin Hall Effect in a Ferromagnetic Metal
• Strong modulation of spin currents in bilayer graphene by static and fluctuating proximity exchange fields
• Competing effects at Pt/YIG interfaces: spin Hall magnetoresistance, magnon excitations and magnetic frustration
• Spin Seebeck Power Conversion
• Theory of Spin Hall Magnetoresistance from a Microscopic Perspective
• Synthetic antiferromagnetic coupling between ultra-thin insulating garnets
• Spin Hall magnetoresistance as a probe for surface magnetization in Pt/CoFe${}_2$O${}_4$ bilayers
• Paramagnetic spin Hall magnetoresistance
• Independent geometrical control of spin and charge resistances in curved spintronics
• Comparison of the use of NiFe and CoFe as electrodes for metallic lateral spin-valves
• Nonreciprocal superconducting transport and the spin Hall effect in gyrotropic structures
• Temperature dependence of the effective spin-mixing conductance probed with lateral non-local spin valves
• Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents
• Magnonic spin Joule heating and rectification effects