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Title: Spin wave interference in YIG cross junction

Abstract

This work is aimed at studying the interference between backward volume magnetostatic spin waves and magnetostatic surface spin waves in a magnetic cross junction. These two types of magnetostatic waves possess different dispersion with zero frequency overlap in infinite magnetic films. However, the interference may be observed in finite structures due to the effect magnetic shape anisotropy. We report experimental data on spin wave interference in a micrometer size Y 3Fe 2(FeO 4) 3 cross junction. There are four micro antennas fabricated at the edges of the cross arms. Two of these antennas located on the orthogonal arms are used for spin wave generation, and the other two antennas are used for the inductive voltage detection. The phase difference between the input signals is controlled by the phase shifter. Prominent spin wave interference is observed at the selected combination of operational frequency and bias magnetic field. The maximum On/Off ratio exceeds 30dB at room temperature. The obtained results are important for a variety of magnetic devices based on spin wave interference.

Authors:
 [1];  [1];  [1];  [2];  [2];  [1]
  1. Univ. of California, Riverside, CA (United States). Dept. of Electrical and Computer Engineering
  2. Kotel'nikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Saratov Branch, Saratov (Russian Federation)
Publication Date:
Research Org.:
Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1349329
Alternate Identifier(s):
OSTI ID: 1393534; OSTI ID: 1421287
Grant/Contract Number:
SC0012670
Resource Type:
Journal Article: Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Spin waves; Magnetic fields; Demagnetization; Antennas; Magnetic anisotropy

Citation Formats

Balinskiy, M., Gutierrez, D., Chiang, H., Filimonov, Y., Kozhevnikov, A., and Khitun, A.. Spin wave interference in YIG cross junction. United States: N. p., 2017. Web. doi:10.1063/1.4974526.
Balinskiy, M., Gutierrez, D., Chiang, H., Filimonov, Y., Kozhevnikov, A., & Khitun, A.. Spin wave interference in YIG cross junction. United States. doi:10.1063/1.4974526.
Balinskiy, M., Gutierrez, D., Chiang, H., Filimonov, Y., Kozhevnikov, A., and Khitun, A.. Tue . "Spin wave interference in YIG cross junction". United States. doi:10.1063/1.4974526.
@article{osti_1349329,
title = {Spin wave interference in YIG cross junction},
author = {Balinskiy, M. and Gutierrez, D. and Chiang, H. and Filimonov, Y. and Kozhevnikov, A. and Khitun, A.},
abstractNote = {This work is aimed at studying the interference between backward volume magnetostatic spin waves and magnetostatic surface spin waves in a magnetic cross junction. These two types of magnetostatic waves possess different dispersion with zero frequency overlap in infinite magnetic films. However, the interference may be observed in finite structures due to the effect magnetic shape anisotropy. We report experimental data on spin wave interference in a micrometer size Y3Fe2(FeO4)3 cross junction. There are four micro antennas fabricated at the edges of the cross arms. Two of these antennas located on the orthogonal arms are used for spin wave generation, and the other two antennas are used for the inductive voltage detection. The phase difference between the input signals is controlled by the phase shifter. Prominent spin wave interference is observed at the selected combination of operational frequency and bias magnetic field. The maximum On/Off ratio exceeds 30dB at room temperature. The obtained results are important for a variety of magnetic devices based on spin wave interference.},
doi = {10.1063/1.4974526},
journal = {AIP Advances},
number = 5,
volume = 7,
place = {United States},
year = {Tue Jan 17 00:00:00 EST 2017},
month = {Tue Jan 17 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4974526

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  • This work is aimed at studying the interference between backward volume magnetostatic spin waves and magnetostatic surface spin waves in a magnetic cross junction. These two types of magnetostatic waves possess different dispersion with zero frequency overlap in infinite magnetic films. However, the interference may be observed in finite structures due to the effect magnetic shape anisotropy. We report experimental data on spin wave interference in a micrometer size Y 3Fe 2(FeO 4) 3 cross junction. There are four micro antennas fabricated at the edges of the cross arms. Two of these antennas located on the orthogonal arms are usedmore » for spin wave generation, and the other two antennas are used for the inductive voltage detection. The phase difference between the input signals is controlled by the phase shifter. Prominent spin wave interference is observed at the selected combination of operational frequency and bias magnetic field. The maximum On/Off ratio exceeds 30dB at room temperature. The obtained results are important for a variety of magnetic devices based on spin wave interference.« less
  • We have investigated the propagation of surface and backward volume spin waves (BVSW) with the in-plane wavevector k{sub {parallel}}=10{endash}900 cm{sup {minus}1} excited by microwaves in YIG and Lu{sub 2.04}Bi{sub 0.96}Fe{sub 5}O{sub 12} (LBIG) films with the film thicknesses 5 and 1.5 {mu}m, respectively. In all cases the magnetization and k{sub {parallel}} were in the film plane. The frequencies of the spin wave excitations as well as the spatial distribution of their intensities in the linear and in the nonlinear excitation regime were measured by means of a high-stabilization, small-angle Brillouin light scattering setup with a spatial resolution of 30 {mu}m.more » It is well-known that in the case of BVSW modes, the Lighthill criterion for modulational instability is fulfilled for both the longitudinal and the transverse perturbations of the initially constant-amplitude wave beam. Therefore, this mode is very much suitable for the investigation of the evolution of a plane-front, constant-amplitude initial beam, and for a direct experimental study of two-dimensional nonlinear diffraction effects of the beam leading to self-focusing. The garnet films with in-plane dimensions of 2{times}10 mm{sup 2} were grown by liquid phase epitaxy onto a single crystalline (111)-oriented gallium gadolinium garnet substrate. Two strip antennas, 35 {mu}m wide and situated at the ends of the films, were used for the excitation of the spin waves and for monitoring. The working frequency was 8.10 GHz. Special efforts were taken to minimize the beam divergence. For all nonlinear studies the initial angular beam divergence was not larger than {Theta}{sub max}=0.05 rad. In the linear regime the attenuation factor was measured, and the reflection of the spin waves from the sample boundaries was studied. We also observed the interference between the two lowest order lateral modes having different initial spatial distributions of the magnetization. (Abstract Truncated)« less