On the origin of noncollinear magnetization coupling across RuX layers
arXiv:2201.08624 · doi:10.1103/PhysRevB.106.054401
Abstract
We present a simple atomistic model for the description of noncollinear coupling in magnetic multilayers with hybrid spacer layers made of Ru alloyed to ferromagnetic atoms such as Fe. In contrast to previous analytical and micromagnetic models that explain the noncollinear coupling by means of lateral fluctuations in the coupling constant, the presented model accounts for atom-atom coupling in all three spatial dimensions within the spacer layer. The new model is able to accurately predict the dependence of the macroscopic bilinear and biquadratic coupling constants on the spacer-layer composition and thickness, showing much better quantitative agreement than lateral-fluctuation models. Moreover, it predicts noncollinear coupling even for infinitely stiff ferromagnetic layers which goes beyond the predictions of previous models.
References in corpus (9)
- Purely Antiferromagnetic Magnetoelectric Random Access Memory
- Spin caloritronic nano-oscillator
- Micromagnetics and spintronics: Models and numerical methods
- Zero Field precession and hysteretic threshold currents in spin torque oscillators with tilted polarizer
- Impact of lattice dynamics on the phase stability of metamagnetic FeRh: Bulk and thin films
- Spin transfer torque oscillator based on asymmetric magnetic tunnel junctions
- Revealing the Hidden Structural Phases of FeRh
- Frequency enhancement and power tunability in tilted polarizer spin-torque nano oscillator
- Significant reduction of critical currents in MRAM designs using dual free layer with perpendicular and in-plane anisotropy