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Title: A spin-wave magnetometer with a positive feedback

Abstract

In this work, we demonstrate experimentally the operation of a spin-wave magnetometer integrated into a circuit with a positive feedback. The circuit consists of the passive magnetic and active electric parts. The magnetic part includes a sensing element, which is a magnetic cross junction made of Y3Fe2(FeO4)3. The electric part includes a non-linear amplifier and a phase shifter. The electric and magnetic parts are connected via micrometer size antennae. Spin waves are excited by two of these antennae while the output inductive voltage produced by the interfering spin waves is detected by the third antenna. Spin waves propagating in the orthogonal arms of the cross can accumulate significantly different phase shifts, depending on the direction and the strength of the external magnetic field. The output inductive voltage reaches its maximum in the case of constructive spin wave interference. The positive feedback provides further signal amplification. It appears possible to enhance the response function, compared to the passive circuits without a feedback, by a factor of ×100 without an increase in the noise level. The experimental data show a prominent response to the external magnetic field variation, exceeding 5 x 103V/T. The intrinsic noise spectral density of the device can bemore » as low as 10-16 V2/Hz. The estimated sensitivity of the prototype device is 2 x 10-12T/√Hz at room temperature. We argue that spin-wave magnetometers can potentially be as sensitive as SQUIDs while operating at room temperature.« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [1]
  1. Univ. of California, Riverside, CA (United States). Dept. of Electrical and Computer Engineering
  2. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Kotelnikov Inst. of Radio-Engineering and Electronics
  3. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Kotelnikov Inst. of Radio-Engineering and Electronics; Saratov State Univ. (Russian Federation)
Publication Date:
Research Org.:
Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
Russian Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1851727
Alternate Identifier(s):
OSTI ID: 1809524
Grant/Contract Number:  
SC0012670; 17-19-01673
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 514; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Materials Science; Physics; Magnetometer; Spin-wave device; Quantum sensor; Noise; Magnons

Citation Formats

Balinskiy, M., Chiang, H., Kozhevnikov, A., Filimonov, Y., Balandin, A. A., and Khitun, A. A spin-wave magnetometer with a positive feedback. United States: N. p., 2020. Web. doi:10.1016/j.jmmm.2020.167046.
Balinskiy, M., Chiang, H., Kozhevnikov, A., Filimonov, Y., Balandin, A. A., & Khitun, A. A spin-wave magnetometer with a positive feedback. United States. https://doi.org/10.1016/j.jmmm.2020.167046
Balinskiy, M., Chiang, H., Kozhevnikov, A., Filimonov, Y., Balandin, A. A., and Khitun, A. Tue . "A spin-wave magnetometer with a positive feedback". United States. https://doi.org/10.1016/j.jmmm.2020.167046. https://www.osti.gov/servlets/purl/1851727.
@article{osti_1851727,
title = {A spin-wave magnetometer with a positive feedback},
author = {Balinskiy, M. and Chiang, H. and Kozhevnikov, A. and Filimonov, Y. and Balandin, A. A. and Khitun, A.},
abstractNote = {In this work, we demonstrate experimentally the operation of a spin-wave magnetometer integrated into a circuit with a positive feedback. The circuit consists of the passive magnetic and active electric parts. The magnetic part includes a sensing element, which is a magnetic cross junction made of Y3Fe2(FeO4)3. The electric part includes a non-linear amplifier and a phase shifter. The electric and magnetic parts are connected via micrometer size antennae. Spin waves are excited by two of these antennae while the output inductive voltage produced by the interfering spin waves is detected by the third antenna. Spin waves propagating in the orthogonal arms of the cross can accumulate significantly different phase shifts, depending on the direction and the strength of the external magnetic field. The output inductive voltage reaches its maximum in the case of constructive spin wave interference. The positive feedback provides further signal amplification. It appears possible to enhance the response function, compared to the passive circuits without a feedback, by a factor of ×100 without an increase in the noise level. The experimental data show a prominent response to the external magnetic field variation, exceeding 5 x 103V/T. The intrinsic noise spectral density of the device can be as low as 10-16 V2/Hz. The estimated sensitivity of the prototype device is 2 x 10-12T/√Hz at room temperature. We argue that spin-wave magnetometers can potentially be as sensitive as SQUIDs while operating at room temperature.},
doi = {10.1016/j.jmmm.2020.167046},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 514,
place = {United States},
year = {Tue Jun 02 00:00:00 EDT 2020},
month = {Tue Jun 02 00:00:00 EDT 2020}
}

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