Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Moshnyaga, Vasily Prof. Dr."
Now showing items 1-20 of 24
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Magneto-thermal conductivity of perovskite manganite films and exchange-spring coupled superlattices
(2024-02-21)In this thesis, thin colossal magnetoresistive perovskite manganite films and superlattices forming an exchange spring magnet were studied regarding their magneto-thermal conductivity. Using the metalorganic aerosol ... -
Elektronenmikroskopische Untersuchung des Einflusses elektrischer Felder auf das Sinterverhalten von Oxidkeramiken
(2023-11-09)Despite the wide application potential of flash sintering for processing ceramic materials, the physical origins of the effect remain unclear. Therefore, the primary objective of this work is to gain a deeper understanding ... -
UV laser modification of transparent materials for photonic applications
(2023-04-28)Photonic applications have experienced strong growth in recent years. Due to increasing digitalization and automation in all areas of life, further growth of photonics is expected in the future. The broad range of photonic ... -
Local excitation of confined molecule-surface hybrid systems
(2022-11-28)Molecule-surface hybrid systems promise solutions for a variety of technological challenges – including the development of efficient catalysts as well as of molecular electronic devices. In this work, different molecule ... -
Investigation of the Influence of Correlations on Photovoltaic Energy Conversion in Hot Polaron Solar Cells
(2022-08-08)In semiconductor single junction solar cells fundamental limitations are given by the two major intrinsic loss mechanisms: a) inability to absorb photons with energies below the band and b) thermalization of photon energies ... -
In-situ Environmental Transmission Electron Microscopy Investigation of Perovskite Oxide Thin Films During Electrochemical Oxygen Evolution Reaction.
(2022-07-21)Despite many theoretical and experimental efforts to find active catalysts in oxygen evolution reaction (OER), the mechanism for high activity and long-term OER stability remains elusive. Catalyst-electrolyte interface ... -
Kationordnung und Grenzflächeneffekte in stark korrelierten Elektronensystemen
(2021-10-05)The work is about cation ordering and interface mechanism in strongly correlated electron systems -
Probing Light-Matter Interactions in Plasmonic Nanotips
(2020-09-03)The exploration of light-matter interaction has inspired some of the most essential theories and applications in fundamental science and technology. Cutting-edge research, such as ultrafast time-resolved and super-resolution ... -
Polaronic behaviour at manganite interfaces studied by advanced Raman scattering techniques
(2020-03-20)This work focusses on the polaronic behaviour at manganite interfaces studied by various Raman spectroscopy techniques. Temperature- and magnetic-field-dependent studies probe the polaronic behaviour at the internal ... -
Correlation between Thermal Transport Mechanisms and Microstructure of Epitaxially Grown (Sb1-xBix)2Te3 Thin Films
(2019-05-23)This thesis experimentally studies the mechanisms associated with the very low lattice thermal conductivities of the ternary van der Waals layered compound (Sb1-xBix)2Te3. This compound presently constitutes one of the ... -
Hydrogen diffusion and hydride formation in grain boundary rich magnesium
(2019-05-06)In the last decade Magnesium (Mg) has attracted much interest as a storage material for hydrogen in a future hydrogen energy based economy. The reasons are its high reversible hydrogen capacity of up to 7,6 wt% and its ... -
In situ studies on palladium/rutile titanium dioxide exposed to low pressure hydrogen gas environments
(2018-11-12)The interaction of hydrogen gas with the palladium/rutile titanium dioxide model system was investigated with strong focus on the interface and its vicinity. Palladium (Pd) films were deposited on pretreated rutile titanium ... -
Ordnungs-/Unordnungsphänomene in korrelierten Perowskitschichten anhand von fortgeschrittener Raman-Spektroskopie
(2018-10-08)Perovskite oxides exhibit, depending on the composition, structural distortions, electronic correlations and ordering/disordering phenomena, a huge variety of electrical and magnetic properties, which is offering a versatile ... -
Mikrostruktur und elektrischer Transport von Sr<sub>1-x</sub>Ca<sub>x</sub>RuO<sub>3</sub>-Dünnfilmen – Der Weg zur Aufdeckung des Fermiflüssigkeitgrundzustandes in CaRuO<sub>3</sub>
(2018-10-02)The present document deals with the material system Sr_(1-x)Ca_(x)RuO_(3). The deposition of highest quality thin films was the central interest as the requirement for the research of electrical transport. Thin films are ... -
Structure and photovoltaic properties of strongly correlated manganite/titanite heterojunctions
(2018-08-21)In the present thesis the photovoltaic (PV) effect in strongly correlated manganite/titanite heterostructures is investigated. As a model system thin films of Pr$_{1-x}$Ca$_{x}$MnO$_{3}$ (PCMO) were deposited on single ... -
Untersuchungen der Wärmekapazität von Nanopartikeln und Multilagen mit der nanokalorimetrischen Methode
(2018-07-23)The heat capacity of samples with characteristic sizes in the nanometer range can differ strongly from the bulk heat capacity. For small samples, surface phonons and mechanical strain have an important effect on the phonon ... -
Lichtinduzierte magnetische Defekte in ultradünnen Filmen
(2018-02-09)Topological defects such as domain walls, vortices or skyrmions in magnetic layers, exhibit promising properties which make them especially interesting for future applications in information technology. This work examines ... -
Hybrid systems of molecular ruthenium catalyst anchored on oxide films for water oxidation: Functionality of the interface
(2017-11-03)The scope of the presented thesis is the realization and detailed analysis of a hybrid system for photoelectrochemical watersplitting with La$_{0.6}$Sr$_{0.4}$MnO$_3$ (LSMO) as photoabsorber and immobilized molecular ... -
Untersuchungen zum Lumineszenzverhalten des Aluminiumnitrids und der Aufbau einer Kurzzeit-Lumineszenz-Spektroskopie-Apparatur
(2017-07-07)This thesis consists of three different parts. In the first part it gives the reader an overview of the published results describing near band-edge as well as defect related luminescence in aluminium nitride, also presenting ... -
Critical thicknesses in Nb-H thin films: coherent and incoherent phase transitions, change of precipitation and growth modes and ultrahigh mechanical stress
(2016-08-03)For nanoscale systems such as Me-H thin films, changes of physical properties have been suggested to appear below certain critical sizes. The probable existence of these critical sizes and the related changes of thermodynamical ...