Strain Induced Modulation of Dzyaloshinskii-Moriya interaction in Pt/Co Bilayer Devices: A Green's Function Approach.
ORAL
Abstract
We use first-principles calculations to study the strain induced control of Dzyaloshinskii-Moriya Interaction (DMI) in ultrathin Pt/Co films. We introduce a Greens function approach to calculate the DMI coefficients that compared to the super-cell and Generalized Bloch approaches is computationally more efficient and accurate. We investigate the dependence of the DMI coefficient for Pt/Co[111] bilayer device on the Pt and Co thicknesses. We compare the calculated results versus Co thickness with the reported experimental data, where we observe a relative agreement. Furthermore, we study the effects of normal and shear strains on the DMI tensor elements. We show that normal(shear) strain results in anisotropic Neel- (Bloch-)type DMI.
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Presenters
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Farzad Mahfouzi
Department of Physics and Astronomy, California State University, Northridge, Northridge, California State University, California State University, Northridge
Authors
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Farzad Mahfouzi
Department of Physics and Astronomy, California State University, Northridge, Northridge, California State University, California State University, Northridge
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Nicholas Kioussis
Department of Physics and Astronomy, California State University, Northridge, Northridge, California State University, Physics and Astronomy, California State University, Northridge, Physics, California State University, Northridge, California State University, Northridge