Reduced monocrystals of Ti-doped material were studied by using electron spin resonance and electron nuclear double resonance methods. This permitted the characterization of a new Ti3+ center with C1 symmetry (labelled Ti3+-H). The Ti3+ ions substituted for W, and exhibited superhyperfine interactions with 2 neighboring W ions and a H impurity ion. A more detailed study was also made of the Ti3+ (C2) center, whose g-values had already been published. The hyperfine tensor for interactions of the 3d1 electron with the nuclear magnetic moments of 47Ti and 49Ti were determined.

A.Watterich, A.Hofstaetter, R.Wuerz, A.Scharmann: Solid State Communications, 1996, 100[7], 513-8