<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> / Thesis / Master of Science (MSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/17618 |
| Date | 09 1900 |
| Creators | Dutton, David Hamilton |
| Contributors | Brockhouse, B. N., Physics |
| Source Sets | McMaster University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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