Deterministic spin-orbit torque switching with a perpendicularly non-uniform magnet
POSTER
Abstract
Spin-orbit torque (SOT) switching of magnetization is a promising emerging technology for non-volatile memory and logic applications. However, deterministic switching of perpendicular magnetization with SOTs requires breaking of inversion-symmetry [1], usually provided by an external magnetic field, which is not suitable for practical applications. We experimentally realize deterministic SOT switching without any external magnetic fields by using a ferromagnet with non-uniform properties in the perpendicular direction (CoFe/CoFeB bilayer). In this structure, a heavy metal acts as the source of SOTs and all the layers have uniform thicknesses. We discuss the role of Dzyaloshinskii-Moriya interaction (DMI) as a possible cause of inversion-symmetry breaking. This method of symmetry breaking for SOT switching can be readily employed in current industrial processes and can pave the way for the practical application of SOT-based technology.
[1] G. Yu et al., Nature Nanotechnology, 2014. 9: p. 548.
[1] G. Yu et al., Nature Nanotechnology, 2014. 9: p. 548.
Presenters
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Seyed Armin Razavi
University of California, Los angeles, University of California, Los Angeles
Authors
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Seyed Armin Razavi
University of California, Los angeles, University of California, Los Angeles
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Hao Wu
University of California, Los Angeles
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Kang-Lung Wang
University of California, Los angeles, Department of Electrical Engineering, University of California, Los Angeles, University of California, Los Angeles, Electrical and Computer Engineering, University of California, Los Angeles