Fluence-Dependent Evolution of Paramagnetic Triplet Centers in e-Beam Irradiated Microcrystalline Ib Type HPHT Diamond

Alexander I. Shames; Alex I. Smirnov; Sergey Milikisiyants; Evgeny O. Danilov; Nicholas Nunn; Gary McGuire; Marco D. Torelli; Olga Shenderova

doi:10.1021/acs.jpcc.7b06514

Fluence-Dependent Evolution of Paramagnetic Triplet Centers in e-Beam Irradiated Microcrystalline Ib Type HPHT Diamond

Alexander I. Shames, Alex I. Smirnov, Sergey Milikisiyants, Evgeny O. Danilov, Nicholas Nunn, Gary McGuire, Marco D. Torelli, Olga Shenderova

Department of Physics

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

Paramagnetic 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 × 10¹⁹ e^-/cm². EPR spectra of mostly "forbidden" Δm_s = 2 electronic spin transitions observed at g ≈ 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 °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.

Original language	American English
Pages (from-to)	22335-22346
Number of pages	12
Journal	Journal of Physical chemistry c
Volume	121
Issue number	40
DOIs	https://doi.org/10.1021/acs.jpcc.7b06514
State	Published - 12 Oct 2017

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.7b06514

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@article{72aed916ab094cbc870bcfb1d82089a5,

title = "Fluence-Dependent Evolution of Paramagnetic Triplet Centers in e-Beam Irradiated Microcrystalline Ib Type HPHT Diamond",

abstract = "Paramagnetic 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 × 1019 e-/cm2. EPR spectra of mostly {"}forbidden{"} Δms = 2 electronic spin transitions observed at g ≈ 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 °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.",

author = "Shames, \{Alexander I.\} and Smirnov, \{Alex I.\} and Sergey Milikisiyants and Danilov, \{Evgeny O.\} and Nicholas Nunn and Gary McGuire and Torelli, \{Marco D.\} and Olga Shenderova",

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doi = "10.1021/acs.jpcc.7b06514",

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T1 - Fluence-Dependent Evolution of Paramagnetic Triplet Centers in e-Beam Irradiated Microcrystalline Ib Type HPHT Diamond

AU - Shames, Alexander I.

AU - Smirnov, Alex I.

AU - Milikisiyants, Sergey

AU - Danilov, Evgeny O.

AU - Nunn, Nicholas

AU - McGuire, Gary

AU - Torelli, Marco D.

AU - Shenderova, Olga

PY - 2017/10/12

Y1 - 2017/10/12

N2 - Paramagnetic 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 × 1019 e-/cm2. EPR spectra of mostly "forbidden" Δms = 2 electronic spin transitions observed at g ≈ 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 °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.

AB - Paramagnetic 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 × 1019 e-/cm2. EPR spectra of mostly "forbidden" Δms = 2 electronic spin transitions observed at g ≈ 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 °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.

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DO - 10.1021/acs.jpcc.7b06514

M3 - Article

SN - 1932-7447

VL - 121

SP - 22335

EP - 22346

JO - Journal of Physical chemistry c

JF - Journal of Physical chemistry c

IS - 40

ER -

Fluence-Dependent Evolution of Paramagnetic Triplet Centers in e-Beam Irradiated Microcrystalline Ib Type HPHT Diamond

Abstract

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