67Zn Mössbauer investigation of lattice-dynamical effects and hyperfine interactions in ZnF2
Abstract
The temperature dependence of lattice-dynamical effects and of hyperfine interactions in 67ZnF2 has been investigated between 4.2 and 55.3 K with use of the 93.3-keV Mössbauer resonance in 67Zn. Within this temperature range the Lamb-Mössbauer factor decreases from 1.23% to 0.46%. The electric quadrupole tensor characterized by eVzzQ/h=+8.2+/-0.1 MHz and η=0.15+/-0.02 is independent of temperature. The data on the quadrupole tensor and on the Lamb-Mössbauer factor exclude a beginning ferroelectric transition, which was proposed to occur at low temperatures. The results on the isomer shift (relative to ZnO) and on the electric quadrupole tensor are in very good agreement with recent theoretical cluster calculations.
- Publication:
-
Physical Review B
- Pub Date:
- February 1990
- DOI:
- 10.1103/PhysRevB.41.1750
- Bibcode:
- 1990PhRvB..41.1750S
- Keywords:
-
- 71.20.Cf;
- 76.80.+y;
- 63.20.-e;
- Mossbauer effect;
- other gamma-ray spectroscopy;
- Phonons in crystal lattices