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Title: Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer

Abstract

The focusing effect for spin waves excited by a curved micrometer-sized coplanar waveguide transducer on top of a 5-μm-thick epitaxial yttrium iron garnet film is studied by means of the micro-focused Mandelstam-Brillouin light scattering technique and micromagnetic simulations. The curvilinear transducer is designed to focus the backward volume spin waves on the in-plane bias magnetic field applied along the symmetry axis of the transducer. We show that two-dimensional maps of spin wave intensity exhibit nonreciprocal properties without mirror symmetry with respect to the magnetic field direction and the focusing effect. The observed effects are the consequence of nonreciprocity of the backward volume spin waves travelling at an angle toward the bias field direction.

Authors:
 [1];  [2]; ORCiD logo [3];  [2]; ORCiD logo [2]; ORCiD logo [2];  [4]; ORCiD logo [5]; ORCiD logo [3]
  1. Univ. of Perugia, Perugia (Italy). Dep. of Physics and Geology
  2. Russian Academy of Sciences (RAS), Saratov (Russian Federation). Inst. of Radioengineering and Electronics (IRE)
  3. Russian Academy of Sciences (RAS), Saratov (Russian Federation). Inst. of Radioengineering and Electronics (IRE); Saratov State Univ. (Russian Federation)
  4. Saratov State Univ. (Russian Federation)
  5. Univ. of California, Riverside, CA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Russian Science Foundation
OSTI Identifier:
1566653
Alternate Identifier(s):
OSTI ID: 1477208
Grant/Contract Number:  
SC0012670; 17-19-01673; 16-07- 01092
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 15; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics

Citation Formats

Madami, M., Khivintsev, Y., Gubbiotti, G., Dudko, G., Kozhevnikov, A., Sakharov, V., Stal'makhov, A., Khitun, A., and Filimonov, Y. Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer. United States: N. p., 2018. Web. doi:10.1063/1.5050347.
Madami, M., Khivintsev, Y., Gubbiotti, G., Dudko, G., Kozhevnikov, A., Sakharov, V., Stal'makhov, A., Khitun, A., & Filimonov, Y. Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer. United States. doi:10.1063/1.5050347.
Madami, M., Khivintsev, Y., Gubbiotti, G., Dudko, G., Kozhevnikov, A., Sakharov, V., Stal'makhov, A., Khitun, A., and Filimonov, Y. Fri . "Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer". United States. doi:10.1063/1.5050347. https://www.osti.gov/servlets/purl/1566653.
@article{osti_1566653,
title = {Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer},
author = {Madami, M. and Khivintsev, Y. and Gubbiotti, G. and Dudko, G. and Kozhevnikov, A. and Sakharov, V. and Stal'makhov, A. and Khitun, A. and Filimonov, Y.},
abstractNote = {The focusing effect for spin waves excited by a curved micrometer-sized coplanar waveguide transducer on top of a 5-μm-thick epitaxial yttrium iron garnet film is studied by means of the micro-focused Mandelstam-Brillouin light scattering technique and micromagnetic simulations. The curvilinear transducer is designed to focus the backward volume spin waves on the in-plane bias magnetic field applied along the symmetry axis of the transducer. We show that two-dimensional maps of spin wave intensity exhibit nonreciprocal properties without mirror symmetry with respect to the magnetic field direction and the focusing effect. The observed effects are the consequence of nonreciprocity of the backward volume spin waves travelling at an angle toward the bias field direction.},
doi = {10.1063/1.5050347},
journal = {Applied Physics Letters},
number = 15,
volume = 113,
place = {United States},
year = {2018},
month = {10}
}

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