Measuring the Interfacial Dzyaloshinskii-Moriya Interaction in Layered GdCo Samples

POSTER

Abstract

In this poster I will discuss our plans to measure the spin wave frequencies in magnetic GdCo samples capped with platinum (Pt) using Brillouin light scattering (BLS). As a result of the large spin-orbit interactions due to the platinum, these thin films are expected to possess a large interfacial Dzyaloshinskii-Moriya interaction (DMI), which in turn, results in a frequency shift between surface spin waves that propagate in opposing directions. I will discuss how this frequency shift comes about and how it can be detected by BLS as a small difference in the photon frequency from that of the probe laser. We can select different wave vectors k for our spin waves by changing the angle of our sample with respect to the BLS probe laser. Measurements of the surface wave frequencies as a function of k, currently ongoing in our lab, will allow us to obtain a quantitative measurement of the interfacial DMI for these samples.

Authors

  • Katherine Nygren

    Physics Department, Colorado State University

  • Colin Roberts

    High Precision Devices, Boulder, CO, Raytheon, Tucson, AZ, Seagate Technology, Minneapolis, MN, Ball Aerospace (retired), Bloomfield, CO, New Mexico State University, Brigham Young University, Colorado State University, Heinrich-Heine-Universitat Dusseldorf, National Security Technologies, Universidad de Buenos Aires, Colorado State Univ, Colorado College, Utah State University, Advisor, Material Physics Group, Utah State University, Box Elder Innovations, LLC, JILA and Department of Physics, CU Boulder, JILA and Department of Mathematics, CU Boulder, Colorado State University, Fort Collins, Colorado 80523, USA, JILA, NIST and the University of Colorado, Boulder, NIST, University of Colorado / NIST, University of Colorado/JILA, Colorado Sch of Mines, Colorado School of Mines, Southwestern Indian Polytechnic Institute, UC-Berkeley, Colorado State University, Fort Collins, CO, Wroclaw University of Science and Technology, Wroclaw, Poland, JILA, University of Colorado and NIST, Harvard University and Harvard-MIT Center for Ultracold Atoms, Univ of Colorado - Boulder, USAFA, Univ of Denver, Boyce Research Initiatives and Educational Foundation, Brilliant Sky Observatory, San Diego Mesa College, Utah Valley University, University of Colorado Boulder, Brigham Young Univ - Provo, Oak Ridge National Laboratory, University of Sherbrooke, NIST Boulder, Universidad Complutense de Madrid, Electrical and Computer Engineering Department, Colorado State University, Fort Collins, Co 80525, Lawrence Livermore National Lab. (United States), Physics Department, Colorado State University, Fort Collins, Co 80525, JILA, Department of Physics, University of Colorado Boulder, Los Alamos National Laboratory, University of Alabama, University of Wyoming, University of Guelph, University of Guelph, Canadian Light source

  • Kristen Buchanan

    Physics Department, Colorado State University, Colorado State University