Near zero-field microwave-free magnetometry with ensembles of nitrogen-vacancy centers in diamond

2023/01/23 by Omkar Dhungel, T. Lenz, Dhungel, Omkar +16 · 2 citations
Materials Science · Earth and Planetary Sciences · Physics and Astronomy · #Diamond and Carbon-based Materials Research #High-pressure geophysics and materials #Advanced Condensed Matter Physics

paper · pdf · doi:10.48550/arxiv.2301.09666

Abstract

We study cross-relaxation features near zero magnetic field with ensembles of nitrogen-vacancy (NV) centers in diamond and examine their properties in samples with a range (0.9 ppm - 16.0 ppm) of NV concentrations. The observed NV-NV cross-relaxation features between differently oriented NV centers in high (greater than 0.9 ppm)-NV-density samples hold promise for a variety of magnetometry applications where microwave fields (or any bias field) disturb the system under study. We theoretically determine the values of the bias magnetic fields corresponding to cross-relaxations between different axes and experimentally validate them. The behavior of zero-field cross-relaxation features as a function of temperature is also investigated.

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• Microwave-free vector magnetometry and crystal orientation determination with Nitrogen-Vacancy centers using Bayesian inference
• Low-field all-optical detection of superconductivity using NV nanodiamonds

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