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Current thesis topics:

Growth and Characterization of Thin Films and Multilayers

As a member of our thin film group you will have the possibility to grow thin layers or mulilayers of oxides using our sputtering systems, oxide flash evaporator, or even our pulsed laser deposition system. You will characterize the grown films by their structural properties with the help of our diffractometer and scanning probe techniques. The samples can be patterned using optical or e-beam lithograhy. The transport properties can be investigated down to low temperatures and high magnetic fields. Today we are mainly interested in novel effects taking place at interfaces of such thin films and the substrate material or even within the interfaces of multilayers. With the materials under investigation we are looking after superconductivity, metal-to-insulator transitions or multiferroicity with the aim to functionalize such interface structures for device applications. If you are interesting in the topic of designing and analyzing thin films, you are warmly welcome to contact either Prof. Gegenwart or Dr. Hammerl for more information. We are looking forward to meeting you! 

Growth and Characterization of magnetic Cerium and Ytterbium compounds

In the group Experimentalphysik 6 exists the possibility to do bachelor's and master's theses in the area of magnetic properties of rare-earth compounds.

Although the phenomenon of magnetism has been known for several thousand years (already Thales v. Milet investigated magnetite in the 6th century B.C.), the underlying physics can be understood only in terms of modern quantum theories. This understanding is important today for various technical applications: energy management, drive engineering, medical technology, aerospace, automatic control engineering, sensor technology, ...

One promising path is the investigation of intermetallic compounds, where one component can assume different valence states. In those compounds, including several rare-earth alloys with Cerium and Ytterbium, it is possible to tune and explore different magnetic and non-magnetic phases by changing an external parameter as temperature, magnetic field, pressure or stoichiometry.

The sample growth is done by arc-melting or flux growth, the structural characterization with powder x-ray diffraction. The magnetic properties are determined via measurements of magnetization, electrical resistivity and specific heat in the temperature range between 2 Kelvin and room temperature in magnetic fields up to 9 Tesla.

If you are interested in doing a bachelor's and master's thesis on this interesting topic, I am happy to provide you with further information. Please feel free to ask!
Dr. Veronika Fritsch