Gorsky relaxation in the presence of traps

Balakrishnan, V. ; Dattagupta, S. (1981) Gorsky relaxation in the presence of traps Zeitschrift fur Physik B Condensed Matter, 42 (1). pp. 13-21. ISSN 0722-3277

Full text not available from this repository.

Official URL: http://www.springerlink.com/index/H7586234180652H5...

Related URL: http://dx.doi.org/10.1007/BF01298287


It has been shown recently that a linear response theoretic formalism leads to a straightforward derivation of the theory of the Gorsky effect at low interstitial concentrations, for arbitrary specimen geometry and applied stress inhomogeneity. We now extend this formalism to the practically important situation in which traps (e.g., N interstitials) inhibit the diffusion of the H interstitials, in order to motivate the experimental application of the Gorsky relaxation technique to the determination of the trap parameters. An explicit calculation is done for a typical specimen geometry, using Schroeder's phenomenological model for diffusion in the presence of traps. Exact expressions are obtained for the anelastic creep function, the relaxation strength and the internal friction. The structure and physical implications of these expressions are discussed using numerical values for the parameters deduced by other methods (in particular, neutron scattering). Noteworthy features of the predicted dynamic response include shifts in the position and height of the Gorsky peak owing to the occurrence of an effective diffusion constant and the difference in the values of the trace of the elastic dipole tensor in the free and trapped states; and an additional Snoek-like contribution due to local free ↔ trapped transitions of the diffusing particles.

Item Type:Article
Source:Copyright of this article belongs to Springer-Verlag.
ID Code:1062
Deposited On:25 Sep 2010 11:08
Last Modified:30 May 2011 05:02

Repository Staff Only: item control page