Advanced Characterization Techniques for Quantifying and Modeling Deformation: Poster Session
Sponsored by: TMS Extraction and Processing Division, TMS Materials Processing and Manufacturing Division, TMS Structural Materials Division, TMS: Advanced Characterization, Testing, and Simulation Committee, TMS: Materials Characterization Committee
Program Organizers: Rodney McCabe, Los Alamos National Laboratory; Marko Knezevic, University of New Hampshire; Irene Beyerlein, University of California, Santa Barbara; Wolfgang Pantleon, Technical University of Denmark; C. Tasan, Massachusetts Institute of Technology; Arul Kumar Mariyappan, Los Alamos National Laboratory; Olivia Underwood Jackson, Sandia National Laboratories
Tuesday 5:30 PM
March 16, 2021
Room: RM 13
Location: TMS2021 Virtual
Magnetic Anisotropy and Stacking Faults in Ag/Pt/Co/Pt Multilayer Thin Films: Yukun Liu1; Michael Kitcher1; Marc De Graef1; Vincent Sokalski1; 1Carnegie Mellon University
Antiskyrmions can potentially exist in low-symmetry ferromagnet–heavy metal (FM–HM) thin films exhibiting perpendicular magnetic anisotropy by Dresselhaus-type anisotropic Dzyaloshinskii-Moriya interactions (aDMI) arising at the FM–HM interfaces. This work presents Ag/Pt/Co/Pt—a novel, prototypical multilayer system grown epitaxially on Si(110) substrates—and investigates its structural and magnetic properties. Measured 2θ-ω X-ray diffraction profiles indicate that despite the face-centered cubic (fcc) underlayers, Co grows as (10.0)-oriented hexagonal closed-packed (hcp) layers with stacking faults and a possible secondary fcc-Co phase. Stacking fault densities were determined from the broadening of related diffraction peaks obtained through X-ray reciprocal space q-scans. The calculated densities indicate a significant amount of stacking faults formed during the growth of Co, possibly alongside an early fcc–hcp transition. Using alternating gradient field magnetometry, we observed in-plane uniaxial anisotropy along the c-axis within the ascertained Co(10.0) layers. Finally, implications for aDMI and antiskyrmion stability are highlighted.