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Title: Spin waves excitation at micron-sized, anisotropy modified regions in amorphous Fe80B20 stripes: Local properties and inter-regions coupling

Abstract

We report on the measurement of the local magnetization dynamics occurring, at units of GHz, in large aspect ratio stripes lithographed from reduced damping amorphous Fe80B20 films. The stripes were submitted to local anisotropy modifications by micrometric beam synchrotron X-ray irradiation. Our results include data on the dispersion relationships and group velocities corresponding to spin waves excited at both the non-irradiated and the irradiated regions. Whereas in the former case we observed standing spin waves with transverse-to-the stripe axis wave vector, in the latter one, for which the wave vector of the spin waves was parallel-to-the stripe axis, propagating spin waves were excited. In both regions, we measured the effective propagation distance of the spin waves, which resulted to be independent of the wave vector orientation. In the spin waves excited at the irradiated region, we also measured the decay time and effective damping coefficient, which was in good agreement with previously reported values obtained from FMR measurements in amorphous Fe80B20 continuous films. We show that the interaction of the non-irradiated and irradiated zones results, at the stripe transverse saturation remanence and under an exciting field frequency of 4 GHz, in the introduction of a π phase shift between themore » standing spin waves excited at both sides of the irradiated region. This result opens the possibility of using the local, transverse to the stripe axis, magnetic anisotropy easy axis induced by the X-ray irradiation as a crucial constituent of a zero-applied field spin wave phase-shifter.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [6];  [7];  [7];  [7];  [5];  [1];  [2];  [2]
+ Show Author Affiliations
  1. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Instituto de Ciencia de Materiales de Madrid (ICMM)
  2. Kiel University, Kiel (Germany). Institute of Materials Science
  3. Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz (Spain)
  4. IMDEA-Nanociencia, Madrid (Spain)
  5. Univ. Politecnica de Madrid (Spain). POEMMA-CEMDATIC
  6. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Instituto de Ciencia de Materiales de Madrid (ICMM); European Synchrotron Radiation Facility (ESRF), Grenoble (France). Spanish CRG BM25-SpLine Beamline
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Spanish Research Agency (AEI); Consejo Superior de Investigaciones Científicas (CSIC); German Research Foundation (DFG)
OSTI Identifier:
1819186
Grant/Contract Number:  
AC02-05CH11231; DFG9/10-2; BES-2014-070387
Resource Type:
Accepted Manuscript
Journal Name:
Materials Science and Engineering. B, Solid-State Materials for Advanced Technology
Additional Journal Information:
Journal Volume: 271; Journal ID: ISSN 0921-5107
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Amorphous Fe80B20; X-ray irradiation; Anisotropy induction; Domain wall stabilization; Spin waves; Dispersion relationship; Group velocity; Phase velocity; Propagation distance; Decay time; Phase-shift

Citation Formats

Urdiroz, Unai, Müller, Cai, Gómez, Alicia, Magaz, M. Teresa, Granados, Daniel, Sánchez Agudo, Marta, Rubio-Zuazo, Juan, Castro, Germán R., Stan, Camelia, Tamura, Nobumichi, Padmore, Howard A., Cebollada, Federico, Palomares, F. Javier, McCord, Jeffrey, and González, Jesús M. Spin waves excitation at micron-sized, anisotropy modified regions in amorphous Fe80B20 stripes: Local properties and inter-regions coupling. United States: N. p., 2021. Web. doi:10.1016/j.mseb.2021.115258.
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Urdiroz, Unai, Müller, Cai, Gómez, Alicia, Magaz, M. Teresa, Granados, Daniel, Sánchez Agudo, Marta, Rubio-Zuazo, Juan, Castro, Germán R., Stan, Camelia, Tamura, Nobumichi, Padmore, Howard A., Cebollada, Federico, Palomares, F. Javier, McCord, Jeffrey, & González, Jesús M. Spin waves excitation at micron-sized, anisotropy modified regions in amorphous Fe80B20 stripes: Local properties and inter-regions coupling. United States. https://doi.org/10.1016/j.mseb.2021.115258
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Urdiroz, Unai, Müller, Cai, Gómez, Alicia, Magaz, M. Teresa, Granados, Daniel, Sánchez Agudo, Marta, Rubio-Zuazo, Juan, Castro, Germán R., Stan, Camelia, Tamura, Nobumichi, Padmore, Howard A., Cebollada, Federico, Palomares, F. Javier, McCord, Jeffrey, and González, Jesús M. Tue . "Spin waves excitation at micron-sized, anisotropy modified regions in amorphous Fe80B20 stripes: Local properties and inter-regions coupling". United States. https://doi.org/10.1016/j.mseb.2021.115258. https://www.osti.gov/servlets/purl/1819186.
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@article{osti_1819186,
title = {Spin waves excitation at micron-sized, anisotropy modified regions in amorphous Fe80B20 stripes: Local properties and inter-regions coupling},
author = {Urdiroz, Unai and Müller, Cai and Gómez, Alicia and Magaz, M. Teresa and Granados, Daniel and Sánchez Agudo, Marta and Rubio-Zuazo, Juan and Castro, Germán R. and Stan, Camelia and Tamura, Nobumichi and Padmore, Howard A. and Cebollada, Federico and Palomares, F. Javier and McCord, Jeffrey and González, Jesús M.},
abstractNote = {We report on the measurement of the local magnetization dynamics occurring, at units of GHz, in large aspect ratio stripes lithographed from reduced damping amorphous Fe80B20 films. The stripes were submitted to local anisotropy modifications by micrometric beam synchrotron X-ray irradiation. Our results include data on the dispersion relationships and group velocities corresponding to spin waves excited at both the non-irradiated and the irradiated regions. Whereas in the former case we observed standing spin waves with transverse-to-the stripe axis wave vector, in the latter one, for which the wave vector of the spin waves was parallel-to-the stripe axis, propagating spin waves were excited. In both regions, we measured the effective propagation distance of the spin waves, which resulted to be independent of the wave vector orientation. In the spin waves excited at the irradiated region, we also measured the decay time and effective damping coefficient, which was in good agreement with previously reported values obtained from FMR measurements in amorphous Fe80B20 continuous films. We show that the interaction of the non-irradiated and irradiated zones results, at the stripe transverse saturation remanence and under an exciting field frequency of 4 GHz, in the introduction of a π phase shift between the standing spin waves excited at both sides of the irradiated region. This result opens the possibility of using the local, transverse to the stripe axis, magnetic anisotropy easy axis induced by the X-ray irradiation as a crucial constituent of a zero-applied field spin wave phase-shifter.},
doi = {10.1016/j.mseb.2021.115258},
journal = {Materials Science and Engineering. B, Solid-State Materials for Advanced Technology},
number = ,
volume = 271,
place = {United States},
year = {Tue Jun 22 00:00:00 EDT 2021},
month = {Tue Jun 22 00:00:00 EDT 2021}
}
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