Magnetically Ordered Insulators for Advanced Spintronics

Abstract

Magnetically ordered, electrically insulating materials pave the way towards novel spintronic devices. In these materials the flow of magnetic excitations such as magnons results in pure spin currents. These spin currents can be driven by gradients of the spin chemical potential and/or temperature such that they can play the same role in novel spintronic devices as charge currents in traditional electronic circuits. Connecting spin current based and charge current based devices requires spin to charge interconversion. This has been achieved by the spin Hall effect with an efficiency of several 10%. The recent progress in materials development and understanding of pure spin current physics opens up a plethora of novel device concepts and opportunities for fundamental studies.

References in corpus (9)

• Theory of spin Hall magnetoresistance
• Spin pumping and spin-transfer torques in antiferromagnets
• Purely Antiferromagnetic Magnetoelectric Random Access Memory
• Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer
• Negative spin Hall magnetoresistance of Pt on the bulk easy-plane antiferromagnet NiO
• Spin convertance at magnetic interfaces
• Long-distance spin transport in a disordered magnetic insulator
• Temperature dependence of the magnon spin diffusion length and magnon spin conductivity in the magnetic insulator yttrium iron garnet
• Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators