Superhyperfine Interaction Due to 13C in the ESR Absorption Spectrum of Mn2+ in Single-Crystal Calcite

Abstract

The superhyperfine structure spectrum of Mn²⁺ interacting with ¹³C nuclei in single crystal calcite has been examined by electron spin resonance absorption spectroscopy at 77°K. An analysis of the spectrum performed in three mutually orthogonal planes of the calcite structure indicates that the core polarization of Mn²⁺ is 134 kOe.