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RESEARCH PRODUCT
Efficient Spin Torques in Antiferromagnetic CoO/Pt Quantified by Comparing Field- and Current-Induced Switching
Olena GomonayRomain LebrunJairo SinovaJairo SinovaC. SchmittMathias KläuiRafael RamosEiji SaitohLorenzo BaldratiRomain Lebrunsubject
Condensed Matter::Materials ScienceMagnetic anisotropyMaterials scienceCondensed matter physicsMagnetoresistanceGeneral Physics and AstronomyAntiferromagnetismTorqueCondensed Matter::Strongly Correlated ElectronsSpin-½Equivalence ratioMagnetic fielddescription
We achieve current-induced switching in collinear insulating antiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This is measured electrically by spin Hall magnetoresistance and confirmed by the magnetic field-induced spin-flop transition of the CoO layer. By applying current pulses and magnetic fields, we quantify the efficiency of the acting current-induced torques and estimate a current-field equivalence ratio of 4×10^{-11} T A^{-1} m^{2}. The Neel vector final state (n⊥j) is in line with a thermomagnetoelastic switching mechanism for a negative magnetoelastic constant of the CoO.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-08-10 | Physical Review Letters |