Neutron Diffraction Studies of the Low Temperature Transition in α’PdD
Neutron diffraction measurements of the equilibrium intensity of the (1 1/2 0) peak in the region of the low temperature transition for PdDx, x = 0.665 and x = 0.640 are presented. An accurate determination of the transition temperature and critical exponent are made, Tc = 42.5 ± 1.0 K and γ = 1.27 ± 0.06 for x = 0.665, Tc = 53.0 ± 0.5 K and γ = 1.31 ± 0.06 for x = 0.640. The relaxation of the peak intensity following a temperature change shows fast and slow time components in agreement with heat release measurements. The neutron slow time constants exhibit critical slowing down in the region of Tc.
KeywordsCritical Exponent Neutron Diffraction Study Equilibrium Intensity Arrhenius Relationship Diffuse Peak
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- 5.C.B. Satterthwaite, T.E. Ellis and J.R. Miller, Physics of Transition Metals (Toronto 1977) IOP Phys. Conf. Ser. 39: 501 (1978).Google Scholar
- 8.J. Als Nielsen, ‘Phase Transitions and Critical Phenomena’, C. Domb and M.S. Green, eds., vol 5a, p. 87, Academic Press, London (1976).Google Scholar
- 11.R.A. Bond and D.K. Ross, J. Phys. F. to be published.Google Scholar