A Magnetometer Based on a Spin Wave Interferometer

Balynsky, M.; Gutierrez, D.; Chiang, H.; Kozhevnikov, A.; Dudko, G.; Filimonov, Y.; Balandin, A. A.; Khitun, A.

doi:10.1038/s41598-017-11881-y

Title: A Magnetometer Based on a Spin Wave Interferometer

Journal Article · Thu Sep 14 00:00:00 EDT 2017 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-017-11881-y· OSTI ID:1474132

Balynsky, M. ^[1]; Gutierrez, D. ^[1]; Chiang, H. ^[1]; Kozhevnikov, A. ^[2]; Dudko, G. ^[2]; Filimonov, Y. ^[3]; Balandin, A. A. ^[1]; Khitun, A. ^[1]

Univ. of California, Riverside, CA (United States). Dept. of Electrical and Computer Engineering
Russian Academy of Sciences (RAS), Moscow (Russian Federation). Koteinikov Inst. of Radioengineering and Electronics
Russian Academy of Sciences (RAS), Moscow (Russian Federation). Koteinikov Inst. of Radioengineering and Electronics; Saratov State Univ. (Russian Federation)

Here, we describe a magnetic field sensor based on a spin wave interferometer. Its sensing element consists of a magnetic cross junction with four micro-antennas fabricated at the edges. Two of these antennas are used for spin wave excitation while two other antennas are used for detection of the inductive voltage produced by the interfering spin waves. Two waves propagating in the orthogonal arms of the cross may accumulate significantly different phase shifts depending on the magnitude and direction of the external magnetic field. This phenomenon is utilized for magnetic field sensing. The sensitivity attains its maximum under the destructive interference condition, where a small change in the external magnetic field results in a drastic increase of the inductive voltage, as well as in the change of the output phase. We report experimental data obtained for a micrometer scale Y₃Fe₂(FeO₄)₃ cross structure. The change of the inductive voltage near the destructive interference point exceeds 40 dB per 1 Oe. The phase of the output signal exhibits a π-phase shift within 1 Oe. The data are collected at room temperature. Taking into account the low thermal noise in ferrite structures, we estimate that the maximum sensitivity of the spin wave magnetometer may exceed attotesla.

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Research Organization:: Univ. of California, Riverside, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1474132

Journal Information:: Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Reconfigurable nanoscale spin-wave directional coupler Wang, Qi; Pirro, Philipp; Verba, Roman Science Advances, Vol. 4, Issue 1 https://doi.org/10.1126/sciadv.1701517	journal	January 2018
The Discrete Noise of Magnons Rumyantsev, S.; Balinskiy, M.; Kargar, F. arXiv https://doi.org/10.48550/arxiv.1810.01500	text	January 2018
Realization of spin wave switch for data processing Balinskiy, M.; Chiang, H.; Khitun, A. AIP Advances, Vol. 8, Issue 5 https://doi.org/10.1063/1.5004992	journal	May 2018
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The effect of material defects on resonant spin wave modes in a nanomagnet Abeed, Md Ahsanul; Sahoo, Sourav; Winters, David arXiv https://doi.org/10.48550/arxiv.2003.03833	text	January 2020
The discrete noise of magnons Rumyantsev, S.; Balinskiy, M.; Kargar, F. Applied Physics Letters, Vol. 114, Issue 9 https://doi.org/10.1063/1.5088651	journal	March 2019
Reconfigurable nano-scale spin-wave directional coupler Wang, Qi; Pirro, Philipp; Verba, Roman arXiv https://doi.org/10.48550/arxiv.1704.02255	text	January 2017

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