Low energy phonon spectrum and its parameterization in pure KTaO3 below 80 K E. Farhi, A. K. Tagantsev, R. Currat, B. Hehlen, E. Courtens and L. A. Boatner Eur. Phys. J. B, 15 4 (2000) 615-623 Published online: 15 June 2000 DOI: 10.1007/s100510051164