Hyperfine Interactions

, Volume 196, Issue 1, pp 339–347

Thermal evolution of the electric field gradient at 181Ta in αHfNi

Authors

    • Laboratory of Nuclear and Plasma PhysicsInstitute of Nuclear Sciences Vinča
  • A. Umićević
    • Laboratory of Nuclear and Plasma PhysicsInstitute of Nuclear Sciences Vinča
  • V. Ivanovski
    • Laboratory of Nuclear and Plasma PhysicsInstitute of Nuclear Sciences Vinča
  • J. Belošević-Čavor
    • Laboratory of Nuclear and Plasma PhysicsInstitute of Nuclear Sciences Vinča
  • V. Koteski
    • Laboratory of Nuclear and Plasma PhysicsInstitute of Nuclear Sciences Vinča
  • Rongwei Hu
    • Condensed Matter Physics and Materials Science DepartmentBrookhaven National Laboratory
    • Department of PhysicsBrown University
  • C. Petrovic
    • Condensed Matter Physics and Materials Science DepartmentBrookhaven National Laboratory
Article

DOI: 10.1007/s10751-009-0135-1

Cite this article as:
Cekić, B., Umićević, A., Ivanovski, V. et al. Hyperfine Interact (2010) 196: 339. doi:10.1007/s10751-009-0135-1

Abstract

The perturbed angular correlation method has been employed to study the temperature dependence of the 181Ta hyperfine interaction parameters in the polycrystalline intermetallic compound αHfNi. At ambient temperature the frequency of the electric quadrupole interaction was ωQ = 26.0(2) Mrad/s and the asymmetry parameter η = 0.22(1). The magnitude of the observed electric field gradient decreases with increasing temperature from 78 to 900 K. The calculations were done using the augmented plane wave plus local orbitals method as implemented in the WIEN2k code, using the generalized gradient approximation. In addition, a supercell calculation with Ta impurity located at the hafnium site was performed. The obtained result is in a good agreement with the experiment.

Keywords

HfNiElectric field gradientPACAPW + lo

PACS

71.70.Jp76.80.+y75.20.−g71.15.Ap71.20.Lp

Copyright information

© Springer Science+Business Media B.V. 2009