Characterization of boron-doped diamonds using 11B high-resolution NMR at high magnetic fields

M. Murakami*, T. Shimizu, M. Tansho, Y. Takano, S. Ishii, E. A. Ekimov, V. A. Sidorov, H. Sumiya, H. Kawarada, K. Takegoshi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


11B static/magic-angle spinning (MAS) NMR experiments are applied to four different B-doped diamond samples prepared by either high-pressure and high-temperature (HPHT) or CVD methods with various starting materials. Application of MAS enhances the spectral resolution appreciably and differences of the four B-doped diamond samples are well reflected in the corresponding MAS spectra. From the comparison among the MAS spectra, and also their dependences on the magnetic-field and the pulse-flip angle, it is suggested that at least four kinds of boron including two kinds of impurities exist in B-doped diamond. We further examine 11B spin-lattice relaxation times (T1) for the four components and find that one of them is extremely short (ca. 500 ms) while others are in the range of several seconds. Relation between the component having the short T1 and the super conducting transition temperature (Tc) value is suggested.

Original languageEnglish
Pages (from-to)1835-1839
Number of pages5
JournalDiamond and Related Materials
Issue number11
Publication statusPublished - 2008 Nov


  • Boron
  • Diamond
  • NMR
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering


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