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Lack of simple correlation between switching current density and spin-orbit torque efficiency of perpendicularly magnetized spin-current generator/ferromagnet heterostructures
- Source :
- Phys. Rev. Applied 15, 024059 (2021)
- Publication Year :
- 2021
-
Abstract
- Spin-orbit torque can drive electrical switching of magnetic layers. Here, we report that at least for micrometer-sized samples there is no simple correlation between the efficiency of dampinglike spin-orbit torque ({\xi}_DL^j) and the critical switching current density of perpendicularly magnetized spin-current generator/ferromagnet heterostructures. We find that the values of {\xi}_DL^j based on switching current densities can either under- or over-estimated {\xi}_DL^j by up to tens of times in a domain-wall depinning analysis, while in the macrospin analysis based on the switching current density {\xi}_DL^j can be overestimated by up to thousands of times. When comparing the relative strengths of {\xi}_DL^j of spin-current generators, the critical switching current densities by themselves are a poor predictor.<br />Comment: Submitted to Phys. Rev. Appl
- Subjects :
- Condensed Matter - Materials Science
Physics - Applied Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 15, 024059 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2101.10521
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.15.024059