Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.070801
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Funding
- NSF [PHY-0855552]
- ONR-MURI
- Direct For Mathematical & Physical Scien [0855552] Funding Source: National Science Foundation
- Division Of Physics [0855552] Funding Source: National Science Foundation
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The temperature dependence of the magnetic-resonance spectra of nitrogen-vacancy (NV(-)) ensembles in the range of 280-330 K was studied. Four samples prepared under different conditions were analyzed with NV(-) concentrations ranging from 10 ppb to 15 ppm. For all samples, the axial zero-field splitting (ZFS) parameter D was found to vary significantly with temperature, T, as dD/dT = -74.2(7) kHz/K. The transverse ZFS parameter E was nonzero (between 4 and 11 MHz) in all samples, and exhibited a temperature dependence of dE/(EdT) = -1.4(3) x 10(-4) K(-1). The results might be accounted for by considering local thermal expansion. The temperature dependence of the ZFS parameters presents a significant challenge for diamond magnetometers and may ultimately limit their bandwidth and sensitivity.
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