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Title: Brillouin-Mandelstam spectroscopy of standing spin waves in a ferrite waveguide

Abstract

This article reports results of experimental investigation of the spin wave interference over large distances in the Y 3Fe 2(FeO 4) 3 waveguide using Brillouin-Mandelstam spectroscopy. Two coherent spin waves are excited by the micro-antennas fabricated at the edges of the waveguide. The amplitudes of the input spin waves are adjusted to provide approximately the same intensity in the central region of the waveguide. The relative phase between the excited spin waves is controlled by the phase shifter. The change of the local intensity distribution in the standing spin wave is monitored using Brillouin-Mandelstam light scattering spectroscopy. Experimental data demonstrate the oscillation of the scattered light intensity depending on the relative phase of the interfering spin waves. The oscillations of the intensity, tunable via the relative phase shift, are observed as far as 7.5 mm away from the spin-wave generating antennas at room temperature. The obtained results are important for developing techniques for remote control of spin currents, with potential applications in spin-based memory and logic devices.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1]
  1. 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)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1470126
Alternate Identifier(s):
OSTI ID: 1414880
Grant/Contract Number:  
SC0012670
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal Issue: 5; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; phonons; thermal conductivity, thermoelectric, spin dynamics, spintronics

Citation Formats

Balinskiy, Michael, Kargar, Fariborz, Chiang, Howard, Balandin, Alexander A., and Khitun, Alexander G. Brillouin-Mandelstam spectroscopy of standing spin waves in a ferrite waveguide. United States: N. p., 2017. Web. doi:10.1063/1.5007165.
Balinskiy, Michael, Kargar, Fariborz, Chiang, Howard, Balandin, Alexander A., & Khitun, Alexander G. Brillouin-Mandelstam spectroscopy of standing spin waves in a ferrite waveguide. United States. doi:10.1063/1.5007165.
Balinskiy, Michael, Kargar, Fariborz, Chiang, Howard, Balandin, Alexander A., and Khitun, Alexander G. Tue . "Brillouin-Mandelstam spectroscopy of standing spin waves in a ferrite waveguide". United States. doi:10.1063/1.5007165. https://www.osti.gov/servlets/purl/1470126.
@article{osti_1470126,
title = {Brillouin-Mandelstam spectroscopy of standing spin waves in a ferrite waveguide},
author = {Balinskiy, Michael and Kargar, Fariborz and Chiang, Howard and Balandin, Alexander A. and Khitun, Alexander G.},
abstractNote = {This article reports results of experimental investigation of the spin wave interference over large distances in the Y3Fe2(FeO4)3 waveguide using Brillouin-Mandelstam spectroscopy. Two coherent spin waves are excited by the micro-antennas fabricated at the edges of the waveguide. The amplitudes of the input spin waves are adjusted to provide approximately the same intensity in the central region of the waveguide. The relative phase between the excited spin waves is controlled by the phase shifter. The change of the local intensity distribution in the standing spin wave is monitored using Brillouin-Mandelstam light scattering spectroscopy. Experimental data demonstrate the oscillation of the scattered light intensity depending on the relative phase of the interfering spin waves. The oscillations of the intensity, tunable via the relative phase shift, are observed as far as 7.5 mm away from the spin-wave generating antennas at room temperature. The obtained results are important for developing techniques for remote control of spin currents, with potential applications in spin-based memory and logic devices.},
doi = {10.1063/1.5007165},
journal = {AIP Advances},
issn = {2158-3226},
number = 5,
volume = 8,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1. FIG. 1. : (A) Schematic of the test structure and experimental setup. The test structure consists of a YIG waveguide with the following dimensions. The length of the channel is 16 mm, the width of the channel is 2 mm. The thickness of the YIG film is 9.6 µm. Theremore » are two micro-antennas fabricated on top of the waveguide. The antennas are connected to microwave source. (B) Photo of the device packaged for testing. (C) Experimental data for spin wave propagation between the antennas 1 and 2. The red curve shows the S21 parameter. The blue curve shows the S12 parameters. The green line corresponds to the chosen operational frequency $f$ = 6.159 GHz, where the both waves show maximum transmission (e.g., S21 = -45 dB, S12 = -53 dB). The inset illustrates the non-reciprocity in the spin wave propagation. (D) Illustration of the spin wave equalization process. The red and the blue solid curves depict the amplitudes of the propagating spin waves excited by the antennas 1 and 2, respectively. In order to equalize the BMS output in a given spot (i.e. the green star), we use an amplifier connected to antenna # 2. The dashed blue curve shows the amplitude of the spin wave excited at the antenna #2 after amplification.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.