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Forschungsbericht
2003 - 2004

 

 
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Institut für Materialphysik

Tel. (0251) 83-33571
Fax: (0251) 83-38346
e-mail: epped@uni-muenster.de
www: uni-muenster.de/Physik/MP/
Wilhelm-Klemm-Str. 10
48149 Münster
Direktor: Prof. Dr. Helmut Mehrer

Forschungsschwerpunkte 2003 - 2004 
 zurück    weiter

 
The academic staff of the Institut für Materialphysik currently comprises two professors (Prof. Dr. H. Mehrer, Prof. Dr. G. Schmitz), two assistant professors (Hochschuldozent Dr. H. Bracht, Privatdozent Dr. N.A. Stolwijk), and two emeriti (Prof. a. D. Dr. Chr. Herzig, Prof. a. D. Dr. E. Nembach). The service staff including secretaries, laboratory technicians, electronic and mechanical workshop members amounts to eleven permanent employees. Furthermore, presently four postdoctoral fellows and scientific guests are members of the institute. In addition about twenty-five graduate students (diploma and doctoral degree) are working in the laboratories of the institute. Some of them are teaching assistants supported by funds of the institute, most of them are supported by research grants.

Research projects at the Institut für Materialphysik are usually carried out by small groups or by individuals supervised by one of the professors. A substantial part of the research activities is pursued by graduate students within time-limited research grants during their dissertation. Research projects often require cooperations with groups at our own university, at other universities in Germany and abroad, and at national or international research centers. The service facilities of the institute include a mechanical and an electronic workshop. The institute is equipped with various facilities for teaching and research in the area of materials science. We mention some of the more important examples: well equipped laboratories for work with radioisotopes in diffusion research, various detection facilities for radionuclides, mechanical and sputtering devices for depth profiling, electron microprobe analyser, analytical transmission electron microscope, precision ion mill for cross section preperation, tomographic atom probe, X-ray facilities including powder diffractometer, Laue- and Debye-Scherrer camera, optical metallography, spark erosion facilities, a variety of high-temperature furnaces for melting materials, for growing single-crystals, and for annealing, UHV sputter chamber for thin film deposition, tensile testing machine, spreading resistance devices and an electrochemical capacitance-voltage device for depth profiling of doping elements in semiconductors, deep level transient spectroscopy for semiconductors, impedance spectroscopy for ion conducting materials, high pressure cell for pressures up to 0.8 GPa.

In January 2000 a Sonderforschungsbereich (SFB 458) was established by the Deutsche Forschungsgemeinschaft at the Westfälische Wilhelms-Universität Münster and granted for a further funding period (2003 - 2005) in autumn 2002. In close cooperation, research groups from the Faculty of Natural Sciences coordinate their efforts towards the topic "Ionic motion in materials with disordered structures". The aim of the Sonderforschungsbereich is a better understanding of ionic motion from the elementary jump process of ions up to their macroscopic transport properties. Presently, the Institut für Materialphysik contributes three research projects in the areas of ion-conducting glasses and polymer electrolytes to the program of the Sonderforschungsbereich.

A Diffusion in Metals, Intermetallics, Silicides, Quasicrystals and Metallic Glasses
1 Ni- and Fe-diffusion in B2-ordered ternary intermetallic compounds.
2 Review on Diffusion in Materials
3 Diffusion in Al-Fe Intermetallic Alloys
4 Diffusion in Molbedenum Dislilcide
5 Diffusion in Ni-Mn and Ni-Pt Alloys
6 Diffusion in Quasicrystalline Materials
7 Effect of alloying on iron diffusion in Fe3Al intermetallic compounds
B Diffusion and Segregation in Grain and Interphase Boundaries
1 Tracer Diffusion and Linear and non-Linear Segregation in Cu Poly- and Bicrystals
2 Grain Boundary Diffusion and Segregation in Compacted and Sintered Nanocrystalline Alloys
3 Investigation of the grain boundary pre-melting phenomenon due to solute segregation, studied for the case of Bi in Cu
4 Grain Boundary Diffusion and Segregation in Cu and Cu-Based Alloys
C Diffusion and Defects in Elementary and Compound Semiconductors
1 Vacancies in III-V compounds induced by dopant diffusion
2 Iridium diffusion in silicon
3 Electrical characterisation of impurities and defects in semiconductors
4 Global parameterization of multiple point-defect dynamics models in silicon
5 Impact of doping and high dislocation densities on gold diffusion in silicon
6 Copper related diffusion phenomena in germanium and silicon
7 Radiation enhanced diffusion in silicon
8 Interference between self- and dopant diffusion in silicon isotope multilayer structures
9 Dopant and self-diffusion in epilayers and isotope heterostructures of silicon carbide (SiC)
10 Mechanism of zinc diffusion in gallium arsenide
11 Curie temperature and carrier concentration gradients in epitaxy-grown Ga1-xMnxAs layers
D Ionic Motion in Materials with Disordered Structures
1 Ionic Transport in Polymer Electrolytes of Variable Composition
2 Diffusion and Ionic Conduction in Borate Glasses
3 Diffusion and Ionic Conduction in Standard Silica Glasses
4 Mixed cation effects in alkali alkaline-earth silicate glasses
5 Nanoscale conductivity spectroscopy on solid electrolytes using an atomic force microscope
6 Ion Transport and Interfacial Reaction of Amorphous Alkali-Borate Films
E Strengthening and Nanostructure of Metals and Alloys
1 Computer simulations of strengthening of materials by nano-scale particles
2 The detrimental effects of precipitate free zones on the yield strength of polycrystals of the commercial nickel-base superalloy NIMONIC PE16, which is strengthened by nano-scale precipitates of the γ'-phase
F Nanoanalysis of Interreactions
1 Thermal stability of GMR sensor devices
2 Structural transformation of oxide tunnel barriers under electrical overload
3 Diffusion induced recrystallization of Au/Cu thin films
4 Nucleation of product phase at reactive diffusion of Co/Al
5 Growth morphology of Cu/SnPb solder reaction
6 Growth of metallic nano-wires by focussed ion-deposition
7 Development of a pulsed laser evaporation tomographic atomprobe

 

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