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Supervisor's Foreword; Abstract; List of Publications ; Published; Unpublished; Acknowledgements; Contents; 1 Introduction: Transition Metal Oxides and Their Heterostructures; References; 2 The Rare-Earth Nickelates; 2.1 Bulk Electronic, Magnetic, and Structural Properties; 2.2 Nickelate Heterostructures; 2.2.1 Orbital Control of Non-collinear Magnetic Order; 2.2.2 Heterostructures Oriented Along the [111] Direction; References; 3 Experimental Techniques; 3.1 Inelastic Raman Light Scattering; 3.1.1 Classical Description of Raman Scattering
3.1.2 Quantum Mechanical Description of Raman Scattering3.1.3 Raman Mode Symmetry and Selection Rules of Nickelates; 3.1.4 Raman Instrumentation; 3.1.5 The Confocal z-scan Technique; 3.1.6 Analysis of the Raman Data; 3.2 Elastic X-Ray Scattering; 3.2.1 Principles of X-Ray Scattering; 3.2.2 X-Ray Absorption Spectroscopy; 3.2.3 Magnetic X-Ray Scattering; 3.2.4 X-Ray Sources: Synchrotron Radiation; References; 4 Tunable Order Parameters in Nickelate Heterostructures; 4.1 Raman Spectroscopy of Ultra-Thin Oxide Heterostructures; 4.1.1 Perovskite Oxide Substrates
4.1.2 Comparing the Confocal z-scan to Previous Raman Studies4.2 Lattice Dynamics of Nickelate Heterostructures; 4.2.1 Ultra-Thin LaNiO3 Films and the Evolution of the Eg Bending Mode; 4.2.2 Phase Transitions of NdNiO3; 4.2.3 Symmetry Analysis and Phonon Calculations; 4.2.4 Comparative Raman Study of Nickelates; 4.3 Spin Density Wave in PrNiO3 Heterostructures; 4.4 Conclusion and Outlook; References; 5 Complex Magnetic Order in Nickelate Slabs; 5.1 [111] Oriented Heterostructures and Interfaces; 5.2 Truncated [111] Nickelate Slabs as an Elementary Magnetic Model System
5.3 Experimental Characterization of Samples5.3.1 Electrical Transport; 5.3.2 Scanning Transmission Electron Microscopy; 5.3.3 Resonant Soft X-Ray Reflectivity; 5.3.4 X-Ray Absorption Spectroscopy; 5.4 Double Cluster Modeling; 5.5 Magnetic Azimuthal Dependence; 5.6 Density Functional Theory Calculations; 5.7 Conclusion and Outlook; References; Appendix A Lattice Constants; Appendix B Raman Intensities
3.1.2 Quantum Mechanical Description of Raman Scattering3.1.3 Raman Mode Symmetry and Selection Rules of Nickelates; 3.1.4 Raman Instrumentation; 3.1.5 The Confocal z-scan Technique; 3.1.6 Analysis of the Raman Data; 3.2 Elastic X-Ray Scattering; 3.2.1 Principles of X-Ray Scattering; 3.2.2 X-Ray Absorption Spectroscopy; 3.2.3 Magnetic X-Ray Scattering; 3.2.4 X-Ray Sources: Synchrotron Radiation; References; 4 Tunable Order Parameters in Nickelate Heterostructures; 4.1 Raman Spectroscopy of Ultra-Thin Oxide Heterostructures; 4.1.1 Perovskite Oxide Substrates
4.1.2 Comparing the Confocal z-scan to Previous Raman Studies4.2 Lattice Dynamics of Nickelate Heterostructures; 4.2.1 Ultra-Thin LaNiO3 Films and the Evolution of the Eg Bending Mode; 4.2.2 Phase Transitions of NdNiO3; 4.2.3 Symmetry Analysis and Phonon Calculations; 4.2.4 Comparative Raman Study of Nickelates; 4.3 Spin Density Wave in PrNiO3 Heterostructures; 4.4 Conclusion and Outlook; References; 5 Complex Magnetic Order in Nickelate Slabs; 5.1 [111] Oriented Heterostructures and Interfaces; 5.2 Truncated [111] Nickelate Slabs as an Elementary Magnetic Model System
5.3 Experimental Characterization of Samples5.3.1 Electrical Transport; 5.3.2 Scanning Transmission Electron Microscopy; 5.3.3 Resonant Soft X-Ray Reflectivity; 5.3.4 X-Ray Absorption Spectroscopy; 5.4 Double Cluster Modeling; 5.5 Magnetic Azimuthal Dependence; 5.6 Density Functional Theory Calculations; 5.7 Conclusion and Outlook; References; Appendix A Lattice Constants; Appendix B Raman Intensities