skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Excitation of the three principal spin waves in yttrium iron garnet using a wavelength-specific multi-element antenna

Authors:
 [1];  [2]; ORCiD logo [3];  [3];  [4];  [2]; ORCiD logo [5]
  1. Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA, Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
  2. Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
  3. Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
  4. Department of Engineering &, Management of Advanced Technology, Chang Jung Christian University, Tainan 71101, Taiwan
  5. Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA, Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208, USA
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1414612
Grant/Contract Number:
SC0014424; AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-12-22 10:13:42; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Bang, Wonbae, Jungfleisch, Matthias B., Lim, Jinho, Trossman, Jonathan, Tsai, C. C., Hoffmann, Axel, and Ketterson, John B. Excitation of the three principal spin waves in yttrium iron garnet using a wavelength-specific multi-element antenna. United States: N. p., 2018. Web. doi:10.1063/1.5007101.
Bang, Wonbae, Jungfleisch, Matthias B., Lim, Jinho, Trossman, Jonathan, Tsai, C. C., Hoffmann, Axel, & Ketterson, John B. Excitation of the three principal spin waves in yttrium iron garnet using a wavelength-specific multi-element antenna. United States. doi:10.1063/1.5007101.
Bang, Wonbae, Jungfleisch, Matthias B., Lim, Jinho, Trossman, Jonathan, Tsai, C. C., Hoffmann, Axel, and Ketterson, John B. 2018. "Excitation of the three principal spin waves in yttrium iron garnet using a wavelength-specific multi-element antenna". United States. doi:10.1063/1.5007101.
@article{osti_1414612,
title = {Excitation of the three principal spin waves in yttrium iron garnet using a wavelength-specific multi-element antenna},
author = {Bang, Wonbae and Jungfleisch, Matthias B. and Lim, Jinho and Trossman, Jonathan and Tsai, C. C. and Hoffmann, Axel and Ketterson, John B.},
abstractNote = {},
doi = {10.1063/1.5007101},
journal = {AIP Advances},
number = 5,
volume = 8,
place = {United States},
year = 2018,
month = 5
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.5007101

Save / Share:
  • We demonstrate the localized excitation and dc electrical detection of magnetostatic surface spin waves (MSSWs) in yttrium iron garnet (YIG) by a shorted coaxial probe. Thin films of NiFe and Pt are patterned at different regions onto a common bulk YIG substrate. A shorted coaxial probe is used to excite spin precession locally near various patterned regions. The dc voltages across the corresponding regions are recorded. For excitation of the Pt regions, the dc voltage spectra are dominated by the spin pumping of MSSWs from YIG, where various modes can be clearly distinguished. For the NiFe region, it is alsomore » found that spin pumping from MSSWs generated in YIG dominated the spectra, indicating that the spin pumped currents are dissipated into charge currents via the inverse Spin Hall effect (ISHE) in NiFe. For all regions, dc signals from YIG MSSWs are observed to be much stronger than the ferromagnetic resonance (FMR) uniform mode, likely due to the nature of the microwave excitation. The results indicate the potential of this probe for microwave imaging via dc detection of spin dynamics in continuous and patterned films.« less
  • We investigate resonant microwave absorption in films of yttrium iron garnet (YIG) with magneetic properties varying through the film thickness. Using measurements of the spin-wave resonant absorption spectra for two different directions of the external magnetic field, we calculate the profile of this nonuniformity. In our investigation of the response of nonuniform films to a pulsed microwave signal, we observed the appearance of delayed pulses, which we interpret to be the result of propagation of exchange spin waves transversely through the film. We analyze the dependence of the time delay on frequency for various nonuniformity profiles, and compare the datamore » obtained with the results of experiment. Our investigation of the spin-wave resonance spectra, as well as the results of our pulsed measurements, show that propagation of spin waves is accompanied by the excitation of acoustic waves. We conclude that ferrite films that vary in the transverse direction can on the one hand be used to efficiently excite short-wavelength exchange spin waves with wave numbers 1{approximately}3 {center_dot}10{sup 5} cm{sup {minus}1}, and on the other hand to excite very high-frequency acoustic waves. 25 refs., 15 figs.« less
  • We present an experimental study of spin-wave excitation and propagation in microstructured waveguides consisting of a 100 nm thick yttrium iron garnet/platinum (Pt) bilayer. The life time of the spin waves is found to be more than an order of magnitude higher than in comparably sized metallic structures, despite the fact that the Pt capping enhances the Gilbert damping. Utilizing microfocus Brillouin light scattering spectroscopy, we reveal the spin-wave mode structure for different excitation frequencies. An exponential spin-wave amplitude decay length of 31 μm is observed which is a significant step towards low damping, insulator based micro-magnonics.
  • In this paper, we explore spin waves excitation in monolithic structures based on yttrium iron garnet (YIG) films with micro-sized antennas. Samples based on plain and patterned YIG film were fabricated and tested for tangential bias field geometries. We observed spin wave excitation and propagation with wave numbers up to 3.5 × 10{sup 4} rad/cm. The corresponding wavelength is thus shorter more than by one order of magnitude compared to previous experiments with such films. For the sample with a periodic array of nanotrenches, we observed the effect of the shape anisotropy resulting in the shift of the spin wave propagation band inmore » comparison to the unpatterned YIG film. Our results are very promising for the exploitation of short spin waves in YIG and provide great opportunity for significant miniaturization of YIG film based microwave devices.« less
  • Here, we investigated the spin-wave propagation in a micro-structured yttrium iron garnet waveguide of 40 nm thickness. Utilizing spatially-resolved Brillouin light scattering microscopy, an exponential decay of the spinwave amplitude of 10 μm was observed. This leads to an estimated Gilbert damping constant of α = (8.79 ± 0.73) x 10 $-$4, which is larger than damping values obtained through ferromagnetic resonance measurements in unstructured films. Furthermore, we compared the theoretically calculated spatial interference of waveguide modes to the spin-wave pattern observed experimentally by means of Brillouin light scattering spectroscopy.