A Magnetometer Based on a Spin Wave Interferometer

Bulletin of the American Physical Society

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APS March Meeting 2018

Volume 63, Number 1

Monday–Friday, March 5–9, 2018; Los Angeles, California

Session X22: Spin-Orbit Effects at Metal/Insulator Interfaces

8:00 AM–11:00 AM, Friday, March 9, 2018
LACC Room: 402A

Sponsoring Units: GMAG DMP FIAP
Chair: Can Onur Avci, Massachusetts Institute of Technology-MIT

Abstract ID: BAPS.2018.MAR.X22.7

Abstract: X22.00007 : A Magnetometer Based on a Spin Wave Interferometer*

9:36 AM–9:48 AM

Abstract

Presenter:

Alexander Khitun
(Electrical and Computer Engineering, University of California Riverside)

Authors:

Michael Balinskiy
(Electrical and Computer Engineering, University of California Riverside)

David Gutierrez
(Electrical and Computer Engineering, University of California Riverside)

Howard Chiang
(Electrical and Computer Engineering, University of California Riverside)

Alexander Kozhevnikov
(Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences)

Galina Dudko
(Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences)

Yuri Filimonov
(Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences)

Alexander Balandin
(Electrical and Computer Engineering, University of California Riverside)

Alexander Khitun
(Electrical and Computer Engineering, University of California Riverside)

Collaboration:

Alexander Khitun

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. The sensitivity attains its maximum under the destructive interference condition. 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.

*This was supported by the Spins and Heat in Nanoscale Electronic Systems (SHINES), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences (BES) under Award # SC0012670. The work of G.M. Dudko, A.V. Kozhevnikov and Y.A. Filimonov is supported b

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.X22.7

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