Current induced torques in structures with ultra-thin IrMn antiferromagnet
arXiv:1503.03729 · doi:10.1103/PhysRevB.92.165424
Abstract
Relativistic current induced torques and devices utilizing antiferromagnets have been independently considered as two promising new directions in spintronics research. Here we report electrical measurements of the torques in structures comprising a ~nm thick layer of an antiferromagnet IrMn. The reduced Néel temperature and the thickness comparable to the spin-diffusion length allow us to investigate the role of the antiferromagnetic order in the ultra-thin IrMn films in the observed torques. In a Ta/IrMn/CoFeB structure, IrMn in the high-temperature phase diminishes the torque in the CoFeB ferromagnet. At low temperatures, the antidamping torque in CoFeB flips sign as compared to the reference Ta/CoFeB structure, suggesting that IrMn in the antiferromagnetic phase governs the net torque acting on the ferromagnet. At low temperatures, current induced torque signatures are observed also in a Ta/IrMn structure comprising no ferromagnetic layer.
5 pages, 4 figures
References in corpus (2)
Cited by in corpus (34)
- Antiferromagnetic spintronics
- Antiferromagnetic spintronics
- Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
- Spin-polarized current in non-collinear antiferromagnets
- Subterahertz spin pumping from an insulating antiferromagnet
- Spin-orbit torques in locally and globally non-centrosymmetric crystals: Antiferromagnets and ferromagnets
- Enhanced spin pumping efficiency in antiferromagnetic IrMn thin films around the magnetic phase transition
- Concepts of antiferromagnetic spintronics
- Magnetic anisotropy in antiferromagnetic hexagonal MnTe
- Spin-orbit torque in MgO/CoFeB/Ta/CoFeB/MgO symmetric structure with interlayer antiferromagnetic coupling
- Perspective on Metallic Antiferromagnets
- A fully relativistic description of spin-orbit torques by means of linear response theory
- Spin Hall magnetoresistance in antiferromagnet/normal metal bilayers
- Spin diffusion and torques in disordered antiferromagnets
- Spin-Torque-driven Terahertz Auto Oscillations in Non-Collinear Coplanar Antiferromagnets
- Epitaxial growth, structural characterization and exchange bias of non-collinear antiferromagnetic MnIr thin films
- Magnetic and electrical transport signatures of uncompensated moments in epitaxial thin films of the non-collinear antiferromagnet MnIr
- Determination of spin relaxation times in heavy metals via 2nd harmonic spin injection magnetoresistance
- All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
- Spin-orbit torques and tunable Dzyaloshinskii-Moriya interaction in Co/Cu/Co trilayers
- Investigation of anomalous-Hall and spin-Hall effects of antiferromagnetic IrMn sandwiched by Pt and YIG layers
- Temperature and thickness dependence of tunneling anisotropic magnetoresistance in exchange-biased Py/IrMn/MgO/Ta stacks
- Optical signatures of spin symmetries in unconventional magnets
- Magnetic parity violation and parity-time-reversal-symmetric magnets
- Spin pumping in noncollinear antiferromagnets
- Spin glass transition in a thin-film NiO/Permalloy bilayer
- Chirality-induced linear response properties in non-coplanar MnGe
- Voltage-Controlled High-Bandwidth Terahertz Oscillators Based On Antiferromagnets
- Spin-orbit-torque MRAM: from uniaxial to unidirectional switching
- Experimental demonstration and analysis of random field effects in ferromagnet/antiferromagnet bilayers
- Antiferromagnet-mediated interlayer exchange: hybridization versus proximity effect
- Large Surface Magnetization in Noncentrosymmetric Antiferromagnets
- Spin-transport, spin-torque and memory in antiferromagnetic devices: Part of a collection of reviews on antiferromagnetic spintronics
- First-principles calculations of spin-orbit torques in MnAu/heavy-metal bilayers