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Magnetic Resonance Study of Bulky CVD Diamond Disc
Alexander Shames1, Alexander Panich1, Lonia Friedlander2
1Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
Materials (Basel, Switzerland)
|April 27, 2024
Summary
This study investigated thick, polycrystalline chemical vapor deposition (CVD) diamond using magnetic resonance. Results reveal inhomogeneous distribution of nitrogen defects, impacting material properties for advanced applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
Background:
- Polycrystalline chemical vapor deposition (CVD) diamond films are widely used.
- Thicker CVD diamond samples are needed for optical, thermal, mechanical, and radiation sensing applications.
Purpose of the Study:
- To conduct a magnetic resonance and structural study of a thick, sizable polycrystalline CVD diamond disc.
- To investigate the effects of e-beam irradiation, high-temperature annealing, and gamma irradiation on the diamond.
Main Methods:
- Utilized various magnetic resonance techniques.
- Analyzed spectra, electron and nuclear spin relaxation, and nuclear spin diffusion.
Main Results:
- Identified and attributed a variety of paramagnetic defects with doublet and triplet spin origins.
- Observed significant macro- and micro-inhomogeneities in the distribution of nitrogen-related defects.
Conclusions:
- The study provides insights into the defect structure of bulky CVD diamond.
- Understanding defect distribution is crucial for optimizing CVD diamond for advanced applications.
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