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- W1007410229 abstract "This thesis deals with the experimental characterisation of electronic and magnetic properties in single crystalline RE-borocarbides. Measurements of dHvA-oscillations in the nonmagnetic and below Tc = 16.3 K superconducting compound LuNi2B2C result in new insights of the underlying fermi surfaces. Especially one of the measured cross sections shows gapless behavior in the superconducting state. Comparative studies with bandstructure calculations and the related compound YNi2B2C reveal the similarities and differences in the geometry of the fermi surfaces, with tendencies to larger effective masses in LuNi2B2C compared to YNi2B2C. The measured angular dependence Bc2(T, alpha) at low temperatures contradicts the forecasts of an unconventional d-wave-model, which was under consideration to be the responsible mechanism for superconductivity in the borocarbides. The measured Bc2(T)-dependence and the quantitative results of the dHvA-experiments allow a theoretical description of the unusual positive curvature in Bc2(T) in the framework of a two-band model. Magnetisation and neutronen scattering experiments increase the knowledge of the field induced magnetic phases in DyNi2B2C (TN = 10.3 K, Tc = 6.8 K). The neutron scattering experiments confirm the existence of commensurable field induced magnetic structures in DyNi2B2C. The anisotropy and field dependence in the intensity of the fm reflection is interpreted as a multi domain effect." @default.
- W1007410229 created "2016-06-24" @default.
- W1007410229 creator A5001383259 @default.
- W1007410229 date "2022-02-21" @default.
- W1007410229 modified "2023-10-17" @default.
- W1007410229 title "Charakterisierung elektronischer und magnetischer Eigenschaften in Seltenen Erd-Borkarbiden" @default.
- W1007410229 doi "https://doi.org/10.53846/goediss-2730" @default.
- W1007410229 hasPublicationYear "2022" @default.
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