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uSR Insights into Spin Dynamics within Magnetically Frustrated Intermetallic YbCuAs_2

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2024-04-15
Authors/Contributors
Abstract
This study investigates the intermetallic Kondo-lattice system YbCuAs$_2$\ using muon spin relaxation/rotation ($\mu$SR) techniques, comparing the observed local magnetic response with reported macroscopic transport and thermodynamic phenomena. Long-range magnetic ordering is confirmed below the temperature $T = 3.7$ K, contrary to the findings from neutron diffraction measurements. Spontaneous muon spin precession frequencies below the phase transition yield the local magnetic field and evolution of the sublattice magnetization. Above the ordering temperature, four regimes in temperature are observed using $\mu$SR, which correlates directly with features in specific heat and resistivity measurements. Density functional theory calculations suggest three potential muon sites, while point charge crystal electric field calculations yield the electronic energy levels of the Yb$^{3+}$ ion in its crystalline environment. Additionally, calculations of the muon spin-lattice relaxation rate and nuclear dipolar field at the muon sites provide a more comprehensive picture of the electronic and nuclear contributions to the $\mu$SR signal.
Document
Extent
104 pages.
Identifier
etd23073
Copyright statement
Copyright is held by the author(s).
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Supervisor or Senior Supervisor
Thesis advisor: Sonier, Jeff
Thesis advisor: Dunsiger, Sarah
Language
English
Member of collection
Download file Size
etd23073.pdf 17.65 MB

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