%ABirgeneau, R J [Yale Univ., New Haven, Connecticut (United States)]
%ACordes, J [Cambridge Univ., Cambridge (United Kingdom)]
%ADolling, G
%AWoods, A D B
%D1964
%I; Atomic Energy of Canada Limited, Chalk River, Ontario (Canada)
%J
%K75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY, BORN-VON KARMAN THEORY, DISPERSION RELATIONS, LATTICE VIBRATIONS, MONOCRYSTALS, NEUTRON SPECTROSCOPY, NICKEL
%PMedium: X; Size: 7 pages
%TNormal modes of vibration in nickel
%XThe frequency-wave-vector dispersion relation, {nu}(q), for the normal vibrations of a nickel single crystal at 296{sup o}K has been measured for the [{zeta}00], [{zeta}00], [{zeta}{zeta}{zeta}], and [0{zeta}1] symmetric directions using inelastic neutron scattering. The results can be described in terms of the Born-von Karman theory of lattice dynamics with interactions out to fourth-nearest neighbors. The shapes of the dispersion curves are very similar to those of copper, the normal mode frequencies in nickel being about 1.24 times the corresponding frequencies in copper. The fourth-neighbor model was used to calculate the frequency distribution function g({nu}) and related thermodynamic properties. (author)
%0Technical Report
Canada TRN: CA0600588077093 CANN English