Exchange coupling-assisted 13C dynamic nuclear polarization in microdiamond at 14 T

Key Points

• The research aims to explore the enhancement of electron spin polarization using nitrogen substitution defects in microdiamond.
• Investigated nitrogen substitution defects in Type 1b diamonds.
• Employed high pressure and high temperature (HPHT) synthesis methods.
• Examined electron spin polarization under conditions of 14 T magnetic field.
• Enhanced electron spin polarization in microdiamond observed due to exchange coupling effects.
• The study highlighted the significant role of P1 centers in dynamical nuclear polarization.