Abstract
Angle-dependent Mössbauer investigation on single crystals of barium nitroprosside (BNP) using a-, b- and c-crystal cuts has been performed. The EFG tensor has been fully determined by the orientation between the main EFG component VZZ and the b-crystal axis (α=±6(2)°) and by the asymmetry parameter (η=0.04(2)). Mössbauer spectra of powder samples have been recorded at 293 K and at liquid helium temperature in an external magnetic field. In spite of the negligible Goldanskii-Karyagin effect observed in the powder sample a remarkable vibrational anisotropy was found in the crystal. The Lamb–Mössbauer factors along the main crystallographic directions are: fLM(a)=0.36(1); fLM(b)=0.23(1) and fLM(c)=0.50(1). The relative orientation of the main component of the MSD tensor with respect to the b-crystal axis is ω=±36(5)°.
| Original language | English |
|---|---|
| Journal | Hyperfine Interactions |
| Volume | 141-142 |
| Issue number | 1-4 |
| Pages (from-to) | 223-229 |
| Number of pages | 7 |
| ISSN | 0304-3843 |
| DOIs | |
| Publication status | Published - 28.06.2002 |
Funding
Sv. Stankov is very much indebted to the DAAD for the provided Research Fellow Grant. V. Rusanov gratefully acknowledges the support by the German Research Foundation (DFG) and the Alexander von Humboldt Foundation. We thank Dr. Ivan Mandjukov for the technical assistance with the macrophotography.