Temperature dependence of the nitrogen-vacancy magnetic resonance in diamond

Details Temperature dependence of the nitrogen-vacancy magnetic resonance in diamond Temperature dependence of the nitrogen-vacancy magnetic resonance in diamond

2009-11-20

arxiv.org/abs/0911.3938v4

Phys. Rev. Lett. 104, 070801 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, 1 table

Scientific paper

10.1103/PhysRevLett.104.070801

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 studied with NV- concentrations ranging from 10 ppb to 15 ppm. For all of these 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 non-zero (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 observation of the temperature dependence of the ZFS parameters presents a significant challenge for room-temperature diamond magnetometers and may ultimately limit their bandwidth and sensitivity.

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