@article{10902/24175,
year = {2021},
month = {4},
url = {http://hdl.handle.net/10902/24175},
abstract = {ABSTRACT: The elastic properties of γ-LiAlO2 were reinvestigated with the aid of resonant ultrasound spectroscopy (RUS) at ambient conditions. A strong discrepancy of the elastic coefficients derived by RUS can be found from the experimental results from literature, where c12 and c13 deviate from our results by about 15 % (24 GPa) and 60 % (42 GPa), respectively. In contrast to the experimental cij from literature we can recognize a good agreement between the elastic coefficients derived from RUS and the values using density functional theory (DFT). The dielectric permittivity was measured on large plane-parellel plates and the piezoelectric stress coefficient e123 = 0.14 C m−2 was derived from RUS measurements at ambient conditions. The heat capacity between 4 K – 398 K has been obtained by microcalorimetry using a relaxation calorimeter. The Debye temperature was derived from heat capacity measurements (⊝ Cp = 676 K) and from RUS measurements (⊝ elastic = 688 K).},
organization = {The authors are grateful to J. Schreuer (Ruhr-Universit¨at Bochum, Germany) for providing the computer program RUSREF used in the refinement of resonant ultrasound spectra. The authors gratefully acknowledge
the Leibniz-institute for crystal growth (IKZ, Berlin, Germany) for the provision of a single crystal of γ-LiAlO2
and the DFG for financial support of this investigation (HA 5137/3 and HA 5137/5). J.R.-F. acknowledges the
MCINN (PGC2018-097520-A-100).},
publisher = {American Institute of Physics},
publisher = {Journal of Applied Physics 129(14), 145108 (2021)},
title = {Single-crystal elastic and thermodynamic properties of gamma-LiAlO2},
author = {Haussühl, Eiken and Bayarjargal, Lkhamsuren and Ruiz Fuertes, Javier},
}