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http://hdl.handle.net/11375/8403
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DC Field | Value | Language |
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dc.contributor.advisor | Datars, W. R. | en_US |
dc.contributor.author | Ning, Yuebin | en_US |
dc.date.accessioned | 2014-06-18T16:42:49Z | - |
dc.date.available | 2014-06-18T16:42:49Z | - |
dc.date.created | 2010-12-03 | en_US |
dc.date.issued | 1991-06 | en_US |
dc.identifier.other | opendissertations/3610 | en_US |
dc.identifier.other | 4627 | en_US |
dc.identifier.other | 1670449 | en_US |
dc.identifier.uri | http://hdl.handle.net/11375/8403 | - |
dc.description.abstract | <p>The magnetic susceptibility, resistivity, and Hall coefficient of single crystals of UNi₂Si₂ and UNi₂Ge₂ have been investigated. Thermoelectric power and specific heat measurements of UNi₂Si₂ have also been carried out.</p> <p>The magnetic susceptibility of UNi₂Si₂ and UNi₂Ge₂ follows the Curie-Weiss law in the paramagnetic state at high temperatures and the anisotropy shows that the magnetic moments on the U atoms are constrained to lie preferentially along the c axis.</p> <p>The resistivity of these two compounds is largely due to magnetic scattering and the phonon contribution only amounts to 8-14% of the total resistivity at room temperature. Along the c axis, the resistivity shows a Kondo type of behaviour at high temperatures. The temperature dependence of the Hall coefficient can be accounted for by a theoretical model invoking a magnetic skew-scattering process. Distinct features and anomalies are observed in both the resistivity and the Hall coefficient at the magnetic transitions of these two compounds.</p> <p>The thermoelectric power of single crystal UNi₂Si₂ is also anisotropic, with the c-axis component strongly coupled to the magnetic phase transitions. The gamma value obtained from the specific heat measurements of UNi₂Si₂ is 22 mJ mol⁻¹ K⁻² which indicates a small mass enhancement in the system.</p> | en_US |
dc.subject | Physics | en_US |
dc.subject | Physics | en_US |
dc.title | Electrical, Magnetic and Thermal Properties of UNi₂Si₂ and UNi₂Ge₂ | en_US |
dc.type | thesis | en_US |
dc.contributor.department | Physics | en_US |
dc.description.degree | Doctor of Philosophy (PhD) | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
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fulltext.pdf | 3.99 MB | Adobe PDF | View/Open |
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