Fluence-Dependent Evolution of Paramagnetic Triplet Centers in e-Beam Irradiated Microcrystalline Ib Type HPHT Diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-09-19 |
| Journal | The Journal of Physical Chemistry C |
| Authors | Alexander I. Shames, Alex I. Smirnov, Sergey Milikisiyants, Evgeny O. Danilov, Nicholas Nunn |
| Institutions | AdƔmas Nano (United States), North Carolina State University |
| Citations | 29 |
Abstract
Section titled āAbstractāParamagnetic triplet centers produced by e-beam irradiation of synthetic microcrystalline Ib-type high-pressure high-temperature (HPHT) diamonds were studied by continuous wave (CW) electron paramagnetic resonance (EPR) spectroscopy at X-band (9.4 GHz), pulsed EPR at X- and Q-bands (34 GHz), and fluorescence spectroscopies as a function of radiation fluences up to 5 Ć 1019 e-/cm2. EPR spectra of mostly āforbiddenā Īms = 2 electronic spin transitions observed at g ā 4 (i.e., so-called half-field EPR spectra) reveal the presence of the main W15 triplet defects associated with the fluorescent negatively charged nitrogen-vacancy (NV-) centers as well as additional triplet spin centers identified as W16, W17, W18, and W33 that appear upon increasing the e-beam fluence. Consequent annealing at 1,400 Ā°C significantly reduces the content of W17, W18, and W33 but not W15 and W16 defects. The efficacy of NV- center fabrication as a function of fluence dependent e-beam irradiation is also reported.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2001 - Optical properties of diamond [Crossref]