Synthetic antiferromagnetic coupling between ultra-thin insulating garnets
arXiv:1803.05545 · doi:10.1103/PhysRevApplied.10.044046
Abstract
The use of magnetic insulators is attracting a lot of interest due to a rich variety of spin-dependent phenomena with potential applications to spintronic devices. Here we report ultra-thin yttrium iron garnet (YIG) / gadolinium iron garnet (GdIG) insulating bilayers on gadolinium iron garnet (GGG). From spin Hall magnetoresistance (SMR) and X-ray magnetic circular dichroism measurements, we show that the YIG and GdIG magnetically couple antiparallel even in moderate in-plane magnetic fields. The results demonstrate an all-insulating equivalent of a synthetic antiferromagnet in a garnet-based thin film heterostructure and could open new venues for insulators in magnetic devices. As an example, we demonstrate a memory element with orthogonal magnetization switching that can be read by SMR.
arXiv comment12 pages, 5 figures, Supplemental Material (3 pages)
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- Chiral spin-wave velocities induced by all-garnet interfacial Dzyaloshinskii-Moriya interaction in ultrathin yttrium iron garnet films
- Low damping and microstructural perfection of sub-40nm-thin yttrium iron garnet films grown by liquid phase epitaxy
- Perspective on Metallic Antiferromagnets
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- Topological spin Hall effects and tunable skyrmion Hall effects in uniaxial antiferromagnetic insulators
- Control of nonlocal magnon spin transport via magnon drift currents
- Magnetic properties and domain structure of ultrathin yttrium iron garnet/Pt bilayers
- Strong interfacial exchange field in a heavy metal/ferromagnetic insulator system determined by spin Hall magnetoresistance
- Spin transport parameters of NbN thin films characterised by spin pumping experiments
- Large unidirectional spin Hall and Rashba-Edelstein magnetoresistance in topological insulator/magnetic insulator heterostructures
- Spin-Hall magnetoresistance in a low-dimensional magnetic insulator
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- Magnetic coupling in YFeO/GdFeO heterostructures
- Magnon hybridization in ferrimagnetic heterostructures
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- Structural, magnetostatic and magnetodynamic studies of Co/Mo-based uncompensated synthetic antiferromagnets
- Electrical detection of interfacial exchange field at the (ferromagnetic insulator)|(normal metal) interface using spin-dependent scattering