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http://hdl.handle.net/11375/17618
Title: | The Crystal Dynamics of Platinum |
Authors: | Dutton, David Hamilton |
Advisor: | Brockhouse, B. N. |
Department: | Physics |
Keywords: | platinum, crystal, neutrons, force, linear, Kohn |
Publication Date: | Sep-1970 |
Abstract: | <p> The dispersion relations in Platinum have been measured at 90°K by the inelastic scattering of thermal neutrons. Born-von Karman models of the force system have been calculated by a process of linear least squares fitting to the dispersion curves. Fourth neighbour forces with weaker interactions extending to at least sixth neighbours are required to fit the data. A frequency distribution has been computed using the force constants of the most realistic model.</p> <p> Some interesting anomalous behaviour in the [035]T1 branches of both Platinum and Palladium has been investigated in detail at temperatures of 90,296 and 473°K. A qualitative analysis indicates that the behaviour is caused by the Kohn effect though its manifestation is rather unusual.</p> |
URI: | http://hdl.handle.net/11375/17618 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Dutton_David_H._1970:09_Masters..pdf | 2.2 MB | Adobe PDF | View/Open |
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