Radiation of spin waves from the open end of a microscopic magnetic-film waveguide

POSTER

Abstract

We have studied experimentally the radiation of spin waves from a permalloy-film microwaveguide into a continuous permalloy film. We show that due to a strong mismatch of the spin-wave spectrum caused by a variation in the demagnetizing field at the interface between the waveguide and the film, a frequency interval exists, where spin waves experience total reflection from the junction penetrating into the permalloy film in a tunnelinglike manner. At frequencies above this interval, complex frequency-dependent radiation patterns were observed characterized by a preferential radiation direction appearing due to the intrinsic anisotropy of the spin-wave dispersion characteristics in the film.

Authors

  • Daniel Birt

    Texas Materials Institute, University of Texas at Austin

  • Vladislav Demidov

    Institute for Applied Physics, University of Muenster

  • Sacha Kopp

    Texas Lutheran, Texas Lutheran University, Bastrop ISD, Lego Education, LEGO Education, South Texas Chapter, Health Physics Society, Waxahachie Early College High School, Navarro College, and Texas A\&M Commerce, PTRA/AAPT, National Instruments, Department of Physics, University of Texas at Austin, Texas A&M University - Commerce, University of Dallas, Austin Community College, Angelo State University, K-12 Science Consultant Birdville ISD, Energy Institute, University of Texas at Austin, Southern Univertisy Baton Rouge, Univ. of Arkansas, Univ. of Central Florida, JQI, NIST and Univ. of Maryland, UT Austin, Center for Ultrafast Optical Science, University of Michigan, Lawrence Berkeley National Laboratory, University of Texas at Austin, Lockheed Martin, NASA, South Plains College, LBNL-ALS, Berkeley, Denison U., Granville, U. of Nevada, Reno, Justus-Liebig-Universitat, Giessen, Western Michigan U., Kalamazoo, University of Texas at Austin, Department of Physics, Institute for Applied Physics, University of Muenster

  • Sacha Kopp

    Texas Lutheran, Texas Lutheran University, Bastrop ISD, Lego Education, LEGO Education, South Texas Chapter, Health Physics Society, Waxahachie Early College High School, Navarro College, and Texas A\&M Commerce, PTRA/AAPT, National Instruments, Department of Physics, University of Texas at Austin, Texas A&M University - Commerce, University of Dallas, Austin Community College, Angelo State University, K-12 Science Consultant Birdville ISD, Energy Institute, University of Texas at Austin, Southern Univertisy Baton Rouge, Univ. of Arkansas, Univ. of Central Florida, JQI, NIST and Univ. of Maryland, UT Austin, Center for Ultrafast Optical Science, University of Michigan, Lawrence Berkeley National Laboratory, University of Texas at Austin, Lockheed Martin, NASA, South Plains College, LBNL-ALS, Berkeley, Denison U., Granville, U. of Nevada, Reno, Justus-Liebig-Universitat, Giessen, Western Michigan U., Kalamazoo, University of Texas at Austin, Department of Physics, Institute for Applied Physics, University of Muenster

  • Sacha Kopp

    Texas Lutheran, Texas Lutheran University, Bastrop ISD, Lego Education, LEGO Education, South Texas Chapter, Health Physics Society, Waxahachie Early College High School, Navarro College, and Texas A\&M Commerce, PTRA/AAPT, National Instruments, Department of Physics, University of Texas at Austin, Texas A&M University - Commerce, University of Dallas, Austin Community College, Angelo State University, K-12 Science Consultant Birdville ISD, Energy Institute, University of Texas at Austin, Southern Univertisy Baton Rouge, Univ. of Arkansas, Univ. of Central Florida, JQI, NIST and Univ. of Maryland, UT Austin, Center for Ultrafast Optical Science, University of Michigan, Lawrence Berkeley National Laboratory, University of Texas at Austin, Lockheed Martin, NASA, South Plains College, LBNL-ALS, Berkeley, Denison U., Granville, U. of Nevada, Reno, Justus-Liebig-Universitat, Giessen, Western Michigan U., Kalamazoo, University of Texas at Austin, Department of Physics, Institute for Applied Physics, University of Muenster

  • Sacha Kopp

    Texas Lutheran, Texas Lutheran University, Bastrop ISD, Lego Education, LEGO Education, South Texas Chapter, Health Physics Society, Waxahachie Early College High School, Navarro College, and Texas A\&M Commerce, PTRA/AAPT, National Instruments, Department of Physics, University of Texas at Austin, Texas A&M University - Commerce, University of Dallas, Austin Community College, Angelo State University, K-12 Science Consultant Birdville ISD, Energy Institute, University of Texas at Austin, Southern Univertisy Baton Rouge, Univ. of Arkansas, Univ. of Central Florida, JQI, NIST and Univ. of Maryland, UT Austin, Center for Ultrafast Optical Science, University of Michigan, Lawrence Berkeley National Laboratory, University of Texas at Austin, Lockheed Martin, NASA, South Plains College, LBNL-ALS, Berkeley, Denison U., Granville, U. of Nevada, Reno, Justus-Liebig-Universitat, Giessen, Western Michigan U., Kalamazoo, University of Texas at Austin, Department of Physics, Institute for Applied Physics, University of Muenster