Diamond magnetometer enhanced by ferrite flux concentrators
Abstract
Magnetometers based on nitrogen-vacancy (NV) centers in diamond are promising room-temperature, solid-state sensors. However, their reported sensitivity to magnetic fields at low frequencies (≲1 kHz) is presently ≳10 pTs1/2, precluding potential applications in medical imaging, geoscience, and navigation. Here we show that high-permeability magnetic flux concentrators, which collect magnetic flux from a larger area and concentrate it into the diamond sensor, can be used to improve the sensitivity of diamond magnetometers. By inserting an NV-doped diamond membrane between two ferrite cones in a bowtie configuration, we realize a ~ 250-fold increase of the magnetic field amplitude within the diamond. We demonstrate a sensitivity of ~ 0.9pTs1/2 to magnetic fields in the frequency range between 10 and 1000 Hz. This is accomplished using a dual-resonance modulation technique to suppress the effect of thermal shifts of the NV spin levels. The magnetometer uses 200 mW of laser power and 20 mW of microwave power. This work introduces a new degree of freedom for the design of diamond sensors by using structured magnetic materials to manipulate magnetic fields.
- Authors:
-
[1];
[3];
[1];
[1]
- Univ. of New Mexico, Albuquerque, NM (United States)
- ODMR Technologies Inc., El Cerrito, CA (United States); Univ. of California, Berkeley, CA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of New Mexico, Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of New Mexico, Albuquerque, NM (United States); Univ. of Latvia, Riga (Latvia)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE; National Institutes of Health (NIH); National Science Foundation (NSF)
- OSTI Identifier:
- 1812678
- Report Number(s):
- LA-UR-21-24314
Journal ID: ISSN 2643-1564; TRN: US2213868
- Grant/Contract Number:
- 89233218CNA000001; 1R01EB025703-01; 1R21EB027405-01; DMR-1809800
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Research
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 2; Journal ID: ISSN 2643-1564
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; Atomic, Nuclear and Particle Physics; Biological Science; Magnetometer, NV-diamond
Citation Formats
Fescenko, Ilja, Jarmola, Andrey, Savukov, Igor, Kehayias, Pauli, Smits, Janis, Damron, Joshua, Ristoff, Nathaniel, Mosavian, Nazanin, and Acosta, Victor M. Diamond magnetometer enhanced by ferrite flux concentrators. United States: N. p., 2020.
Web. doi:10.1103/physrevresearch.2.023394.
Fescenko, Ilja, Jarmola, Andrey, Savukov, Igor, Kehayias, Pauli, Smits, Janis, Damron, Joshua, Ristoff, Nathaniel, Mosavian, Nazanin, & Acosta, Victor M. Diamond magnetometer enhanced by ferrite flux concentrators. United States. https://doi.org/10.1103/physrevresearch.2.023394
Fescenko, Ilja, Jarmola, Andrey, Savukov, Igor, Kehayias, Pauli, Smits, Janis, Damron, Joshua, Ristoff, Nathaniel, Mosavian, Nazanin, and Acosta, Victor M. Wed .
"Diamond magnetometer enhanced by ferrite flux concentrators". United States. https://doi.org/10.1103/physrevresearch.2.023394. https://www.osti.gov/servlets/purl/1812678.
@article{osti_1812678,
title = {Diamond magnetometer enhanced by ferrite flux concentrators},
author = {Fescenko, Ilja and Jarmola, Andrey and Savukov, Igor and Kehayias, Pauli and Smits, Janis and Damron, Joshua and Ristoff, Nathaniel and Mosavian, Nazanin and Acosta, Victor M.},
abstractNote = {Magnetometers based on nitrogen-vacancy (NV) centers in diamond are promising room-temperature, solid-state sensors. However, their reported sensitivity to magnetic fields at low frequencies (≲1 kHz) is presently ≳10 pTs1/2, precluding potential applications in medical imaging, geoscience, and navigation. Here we show that high-permeability magnetic flux concentrators, which collect magnetic flux from a larger area and concentrate it into the diamond sensor, can be used to improve the sensitivity of diamond magnetometers. By inserting an NV-doped diamond membrane between two ferrite cones in a bowtie configuration, we realize a ~ 250-fold increase of the magnetic field amplitude within the diamond. We demonstrate a sensitivity of ~ 0.9pTs1/2 to magnetic fields in the frequency range between 10 and 1000 Hz. This is accomplished using a dual-resonance modulation technique to suppress the effect of thermal shifts of the NV spin levels. The magnetometer uses 200 mW of laser power and 20 mW of microwave power. This work introduces a new degree of freedom for the design of diamond sensors by using structured magnetic materials to manipulate magnetic fields.},
doi = {10.1103/physrevresearch.2.023394},
journal = {Physical Review Research},
number = 2,
volume = 2,
place = {United States},
year = {Wed Jun 24 00:00:00 EDT 2020},
month = {Wed Jun 24 00:00:00 EDT 2020}
}
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