Enhancement of spin transparency by interfacial alloying

Abstract

We report that atomic-layer alloying (intermixing) at a Pt/Co interface can increase, by approximately 30%, rather than degrade the interfacial spin transparency, and thereby strengthen the efficiency of the dampinglike spin-orbit torque arising from the spin Hall effect in the Pt. At the same time, this interfacial alloying substantially reduces fieldlike spin-orbit torque. Insertion of an ultrathin magnetic alloy layer at heavy-metal/ferromagnet interfaces represents an effective approach for improving interfacial spin transparency that may enhance not only spin-orbit torques but also the spin detection efficiency in inverse spin Hall experiments.

References in corpus (8)

• Theory of spin Hall magnetoresistance
• Interface enhancement of Gilbert damping from first-principles
• Spin-orbit torques in heavy metal/ferromagnet bilayers with varying strength of interfacial spin-orbit coupling
• Strong damping-like spin-orbit torque and tunable Dzyaloshinskii-Moriya interaction generated by low-resistivity Pd${}_{1-x}$Pt${}_x$ alloys
• On the origin of field-like spin-orbit torques in heavy metal-ferromagnet-oxide thin film heterostructures
• Enhanced DC Spin Pumping into a Fluctuating Ferromagnet near Tc
• Spin-memory loss due to spin-orbit coupling at ferromagnet/heavy-metal interfaces: Ab initio spin-density matrix approach
• Ballistic spin transport in the presence of interfaces with strong spin-orbit coupling

Cited by in corpus (9)

• Maximizing Spin-Orbit Torque Generated by the Spin Hall Effect of Pt
• Fully Spin-transparent magnetic interfaces enabled by insertion of a paramagnetic NiO layer
• Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy
• Deterministic Generation and Guided Motion of Magnetic Skyrmions by Focused He${}^{+}$-Ion Irradiation
• Lack of simple correlation between switching current density and spin-orbit torque efficiency of perpendicularly magnetized spin-current generator/ferromagnet heterostructures
• Boosting spin-orbit torque efficiency in spin-current generator/magnet/oxide superlattices
• Write asymmetry of spin-orbit torque memory induced by in-plane magnetic fields
• Spin transport and magnetic proximity effect in CoFeB/normal metal/Pt trilayers
• Spin-to-charge conversion in orthorhombic RhSi topological semimetal crystalline thin films