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Dr. rer. nat. Stefan Wagner

Abteilungsleiter
Defekte in Materialien
Gruppe: DiM
Sprechstunden: nach Vereinbarung
Raum: 370 Geb. 10.91
Tel.: +49 721 608 42676
Fax: +49 721 608 48044
stefan wagner3Shm0∂kit edu

Karlsruher Institut für Technologie (KIT)
Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Campus Süd
Engelbert-Arnold-Straße 4
76131 Karlsruhe


Lebenslauf

seit 09.2018 Abteilung "Defekte in Materialien" des Instituts für Angewandte Materialien - Werkstoffkunde des Karlsruher Instituts für Technologie (KIT)
2006 - 2014 Promotion am Institut für Materialphysik der Georg-August-Universität Göttingen, Dissertation: "Dünne Palladium-Wasserstoff-Schichten als Modellsystem: Thermodynamik struktureller Phasenübergänge unter elastischen und mikrostrukturellen Zwangsbedingungen"
2000 - 2006 Studium der Physik an der Georg-August-Universität Göttingen, Diplomarbeit: "Untersuchung der Leitungsmechanismen in wachsenden Palladiumschichten und Veränderung durch Wasserstoffbeladung"

Auszeichnungen

  • Peter-Haasen-Preis 2015, Universität Göttingen

Veröffentlichungen


Probing the Effect of Surface Strain on CO Binding to Pd Thin Films.
Harding, D. J.; Bongers, M. D.; Wagner, S.; Hahn, H.; Neugebohren, J.; Kitsopoulos, T. N.; Wodtke, A. M.; Pundt, A.
2019. The journal of physical chemistry <Washington, DC> / C, 123 (19), 12255–12260. doi:10.1021/acs.jpcc.9b01435
Suppression of Phase Transformation in Nb–H Thin Films below Switchover Thickness.
Burlaka, V.; Wagner, S.; Hamm, M.; Pundt, A.
2016. Nano letters, 16 (10), 6207–6212. doi:10.1021/acs.nanolett.6b02467
Mechanical stress and stress release channels in 10–350 nm palladium hydrogen thin films with different micro-structures.
Wagner, S.; Kramer, T.; Uchida, H.; Dobron, P.; Cizek, J.; Pundt, A.
2016. Acta materialia, 114, 116–125. doi:10.1016/j.actamat.2016.05.023
Achieving reversibility of ultra-high mechanical stress by hydrogen loading of thin films.
Hamm, M.; Burlaka, V.; Wagner, S.; Pundt, A.
2015. Applied physics letters, 106 (24), Art. Nr.: 243108. doi:10.1063/1.4922285
Absorption kinetics and hydride formation in magnesium films: Effect of driving force revisited.
Uchida, H. T.; Wagner, S.; Hamm, M.; Kürschner, J.; Kirchheim, R.; Hjörvarsson, B.; Pundt, A.
2015. Acta materialia, 85, 279–289. doi:10.1016/j.actamat.2014.11.031
In-situ STM and XRD studies on Nb–H films: Coherent and incoherent phase transitions.
Burlaka, V.; Wagner, S.; Pundt, A.
2015. Journal of alloys and compounds, 645 (Supplement 1), S388–S391. doi:10.1016/j.jallcom.2014.12.103
Influence of microstructure and mechanical stress on behavior of hydrogen in 500 nm Pd films.
Vlček, M.; Lukáč, F.; Vlach, M.; Wagner, S.; Uchida, H.; Baehtz, C.; Shalimov, A.; Pundt, A.; Čížek, J.
2015. Journal of alloys and compounds, 645 (Supplement 1), S446–S449. doi:10.1016/j.jallcom.2014.12.086
Stress release during cyclic loading of 20 nm palladium films.
Lukáč, F.; Vlček, M.; Vlach, M.; Wagner, S.; Uchida, H.; Pundt, A.; Bell, A.; Čížek, J.
2015. Journal of alloys and compounds, 645 (Supplement 1), S450–S453. doi:10.1016/j.jallcom.2014.12.085
Investigation of nanocrystalline Gd films loaded with hydrogen.
Hruška, P.; Čížek, J.; Dobroň, P.; Anwand, W.; Mücklich, A.; Gemma, R.; Wagner, S.; Uchida, H.; Pundt, A.
2015. Journal of alloys and compounds, 645 (Supplement 1), S308–S311. doi:10.1016/j.jallcom.2014.12.156
Delamination-supported growth of hydrides in Pd thin films studied by electrochemical hydrogenography.
Kürschner, J.; Wagner, S.; Pundt, A.
2014. Journal of alloys and compounds, 593, 87–92. doi:10.1016/j.jallcom.2014.01.026
Huge hydrogen-induced resistive switching in percolating palladium thin films.
Wagner, S.; Hamm, M.; Pundt, A.
2013. Scripta materialia, 69 (10), 756–759. doi:10.1016/j.scriptamat.2013.08.023
Hydrogen microscopy – Distribution of hydrogen in buckled niobium hydrogen thin films.
Wagner, S.; Moser, M.; Greubel, C.; Peeper, K.; Reichart, P.; Pundt, A.; Dollinger, G.
2013. International journal of hydrogen energy, 38 (31), 13822–13830. doi:10.1016/j.ijhydene.2013.08.006
Hydrogen-induced microstructural changes of Pd films.
Čížek, J.; Melikhova, O.; Vlček, M.; Lukáč, F.; Vlach, M.; Procházka, I.; Anwand, W.; Brauer, G.; Mücklich, A.; Wagner, S.; Uchida, H.; Pundt, A.
2013. International journal of hydrogen energy, 38 (27), 12115–12125. doi:10.1016/j.ijhydene.2013.03.096
SIMS analysis on austenitic stainless steel: The influence of type of oxide surface layer on hydrogen embrittlement.
Izawa, C.; Wagner, S.; Martin, M.; Weber, S.; Pargeter, R.; Michler, T.; Uchida, H. H.; Pundt, A.
2013. Journal of alloys and compounds, 580 (Supplement 1), S13–S17. doi:10.1016/j.jallcom.2013.02.153
Anisotropy of Hydrogen Diffusivity in ZnO.
Čížek, J.; Lukáč, F.; Vlček, M.; Vlach, M.; Procházka, I.; Traeger, F.; Rogalla, D.; Becker, H. W.; Anwand, W.; Brauer, G.; Wagner, S.; Uchida, H.; Pundt, A.; Bähtz, C.
2013. Defect and diffusion forum, 333, 39–49. doi:10.4028/www.scientific.net/DDF.333.39
Structural Studies of Nanocrystalline Thin Pd Films Electrochemically Doped with Hydrogen.
Čížek, J.; Vlček, M.; Lukáč, F.; Vlach, M.; Procházka, I.; Brauer, G.; Anwand, W.; Mücklich, A.; Wagner, S.; Uchida, H.; Pundt, A.
2012. Defect and diffusion forum, 331, 137–147. doi:10.4028/www.scientific.net/DDF.331.137
SIMS study on the surface chemistry of stainless steel AISI 304 cylindrical tensile test samples showing hydrogen embrittlement.
Izawa, C.; Wagner, S.; Martin, M.; Weber, S.; Bourgeon, A.; Pargeter, R.; Michler, T.; Pundt, A.
2011. Journal of alloys and compounds, 509 (Suppl. 2), S885–S890. doi:10.1016/j.jallcom.2010.12.143
Achieving coherent phase transition in palladium–hydrogen thin films.
Wagner, S.; Uchida, H.; Burlaka, V.; Vlach, M.; Vlcek, M.; Lukac, F.; Cizek, J.; Baehtz, C.; Bell, A.; Pundt, A.
2011. Scripta materialia, 64 (10), 978–981. doi:10.1016/j.scriptamat.2011.02.004
Influence of machining-induced martensite on hydrogen-assisted fracture of AISI type 304 austenitic stainless steel.
Martin, M.; Weber, S.; Izawa, C.; Wagner, S.; Pundt, A.; Theisen, W.
2011. International journal of hydrogen energy, 36 (17), 11195–11206. doi:10.1016/j.ijhydene.2011.05.133
Electrical resistivity and hydrogen solubility of PdHc thin films.
Wagner, S.; Pundt, A.
2010. Acta materialia, 58 (4), 1387–1394. doi:10.1016/j.actamat.2009.10.045
Mechanical stress impact on thin Pd1−xFex film thermodynamic properties.
Wagner, S.; Pundt, A.
2008. Applied physics letters, 92 (5), Art. Nr.: 051914. doi:10.1063/1.2841636

Frühere Veröffentlichungen

  • S. Wagner, A. Pundt, Quasi-thermodynamic model on hydride formation in palladium-hydrogen thin films: Impact of elastic and microstructural constraints, International Journal of Hydrogen Energy 41 (2016) 2727. 10.1016/j.ijhydene.2015.11.063
  • S. Wagner, T. Kramer, H. Uchida, P. Dobron, J. Cizek, A. Pundt, Mechanical stress and stress release channels in 10 – 350 nm palladium hydrogen thin films with different microstructures, Acta Materialia 114 (2016) 116. 10.1016/j.actamat.2016.05.023
  • V. Burlaka, S. Wagner, M. Hamm, A. Pundt, Suppression of Phase Transformation in Nb−H Thin Films below Switchover Thickness, Nano Letters 16 (2016) 6207. 10.1021/acs.nanolett.6b02467
  • H. Uchida, S. Wagner, M. Hamm, J. Kürschner, R. Kirchheim, B. Hjörvarsson, A. Pundt, Absorption kinetics and hydride formation in magnesium films: Effect of driving force revisited, Acta Materialia 85 (2015) 279. 10.1016/j.actamat.2014.11.031
  • M. Vlcek, F. Lukac, M. Vlach, I. Prochazka, S. Wagner, H. Uchida, A. Pundt, R. Gemma, J. Cizek, Hydrogen-induced buckling of Pd films deposited on various substrates, Defect and Diffusion Forum 365 (2015) 55. 10.4028/www.scientific.net/DDF.365.55
  • M. Vlcek, F. Lukac, M. Vlach, S. Wagner, H. Uchida, C. Baehtz, A. Shalimov, A. Pundt, J. Cizek, Influence of microstructure and mechanical stress on behavior of hydrogen in 500 nm Pd films, Journal of Alloys and Compounds 645 (2015) S446. 10.1016/j.jallcom.2014.12.086
  • F. Lukac, M. Vlcek, M. Vlach, S. Wagner, H. Uchida, A. Pundt, A. Bell, J. Cizek, Stress release during cyclic loading of 20 nm palladium films, Journal of Alloys and Compounds 645 (2015) S450. 10.1016/j.jallcom.2014.12.085
  • P. Hruska, J. Cizek, P. Dobron, W. Anwand, A. Mucklich, R. Gemma, S. Wagner, H. Uchida, A. Pundt, Investigation of nanocrystalline Gd films loaded with hydrogen, Journal of Alloys and Compounds 645 (2015) S308. 10.1016/j.jallcom.2014.12.156
  • V. Burlaka, S. Wagner, A. Pundt, In-situ STM and XRD studies on Nb–H films: Coherent and incoherent phase transitions, Journal of Alloys and Compounds 645 (2015) S388. 10.1016/j.jallcom.2014.12.103
  • M. Hamm, V. Burlaka, S. Wagner, A. Pundt, Achieving reversibility of ultra-high mechanical stress by hydrogen loading of thin films, Applied Physics Letters 106 (2015) 243108. 10.1063/1.4922285
  • S. Wagner, Dünne Palladium-Wasserstoff-Schichten als Modellsystem: Thermodynamik struktureller Phasenübergänge unter elastischen und mikrostrukturellen Zwangsbedingungen, Dissertation, Göttingen, 2015. http://hdl.handle.net/11858/00-1735-0000-0022-6048-1
  • J. Kürschner, S. Wagner, A. Pundt, Delamination-supported growth of hydrides in Pd thin films studied by electrochemical hydrogenography, Journal of Alloys and Compounds 593 (2014) 87. 10.1016/j.jallcom.2014.01.026
  • S. Wagner, M. Hamm, A. Pundt, Huge hydrogen-induced resistive switching in percolating palladium thin films, Scripta Materialia 69 (2013) 756. 10.1016/j.scriptamat.2013.08.023
  • S. Wagner, M. Moser, C. Greubel, K. Peeper, P. Reichart, A. Pundt, G. Dollinger, Hydrogen microscopy – Hydrogen distribution in buckled niobium hydrogen thin films, International Journal of Hydrogen Energy 38 (2013) 13822. 10.1016/j.ijhydene.2013.08.006
  • J. Cizek, O. Melikhova, M. Vlcek, F. Lukac, M. Vlach, P. Dobron, I. Prochazka, W. Anwand, G. Brauer, S. Wagner, H. Uchida, R. Gemma, A. Pundt, Hydrogen interaction with defects in nanocrystalline, polycrystalline and epitaxial Pd films, Journal of Nano-Research 26 (2013) 123. 10.4028/www.scientific.net/JNanoR.26.123
  • C. Izawa, S. Wagner, M. Martin, S. Weber, R. Pargeter, T. Michler, A. Pundt, SIMS analysis of austenitic stainless steel: The influence of type of oxide surface layer on hydrogen embrittlement, Journal of Alloys and Compounds 580 (2013) S13. 10.1016/j.jallcom.2013.02.153
  • F. Lukac, J. Cizek, M. Vlcek, I. Prochazka, M. Vlach, W. Anwand, G. Brauer, F. Trager, D. Rogalla, H. Becker, S. Wagner, H. Uchida, C. Baehtz, Hydrogen interaction with defects in ZnO, Materials Science Forum 733 (2013) 228. 10.4028/www.scientific.net/MSF.733.228
  • J. Cizek, O. Melikhova, M. Vlcek, F. Lukac, M. Vlach, I. Prochazka, G. Brauer, W. Anwand, A. Mücklich, S. Wagner, H. Uchida, A. Pundt, Hydrogen-induced microstructural changes of Pd films, International Journal of Hydrogen Energy 38 (2013) 12115. 10.1016/j.ijhydene.2013.03.096
  • J. Cizek, F. Lukac, M. Vlcek, M. Vlach, I. Prochazka, F. Traeger, D. Rogalla, H. Becker, W. Anwand, G. Brauer, S. Wagner, H. Uchida, A. Pundt, C. Baehtz, Anisotropy of Hydrogen Diffusivity in ZnO, Defect and Diffusion Forum 333 (2013) 39. 10.4028/www.scientific.net/DDF.333.39
  • J. Cizek, M. Vlcek, F. Lukac, M. Vlach, I. Prochazka, G. Brauer, W. Anwand, A. Mücklich, S. Wagner, H. Uchida, A. Pundt, Structural studies of nanocrystalline thin Pd films electrochemically doped with hydrogen, Defect and Diffusion Forum 331 (2012) 137. 10.4028/www.scientific.net/DDF.331.137
  • S. Wagner, H. Uchida, V. Burlaka, M. Vlach, M. Vlcek, F. Lukac, J. Cizek, C. Baehtz, A. Bell, A. Pundt, Achieving coherent phase transition in palladium hydrogen thin films, Scripta Materialia 64 (2011) 978. 10.1016/j.scriptamat.2011.02.004
  • S. Wagner, A. Pundt, Combined impact of microstructure and mechanical stress on the electrical resistivity of PdHc thin films, Acta Materialia 59 (2011) 1862. 10.1016/j.actamat.2010.11.052
  • C. Izawa, S. Wagner, M. Martin, S. Weber, A. Bourgeon, R. Pargeter, T. Michler, A. Pundt, SIMS study on the surface chemistry of stainless steel AISI 304 cylindrical tensile test samples showing hydrogen embrittlement, Journal of Alloys and Compounds 509 (2011) S885. 10.1016/j.jallcom.2010.12.143
  • M. Martin, S. Weber, C. Izawa, S. Wagner, A. Pundt, W. Theisen, Influence of machining-induced martensite on hydrogen-assisted fracture of AISI type 304 austenitic stainless steel, International Journal of Hydrogen Energy 36 (2011) 11195. 10.1016/j.ijhydene.2011.05.133
  • S. Wagner, A. Pundt, Electrical resistivity and hydrogen solubility of PdHc thin films, Acta Materialia 58 (2010) 1387. 10.1016/j.actamat.2009.10.045
  • S. Wagner, A. Pundt, Conduction mechanisms during the growth of Pd thin films: Experiment and model, Physical Reviews B 78 (2008) 155131. 10.1103/PhysRevB.78.155131
  • S. Wagner, A. Pundt, Mechanical stress impact on thin Pd1-xFex film thermodynamic properties, Applied Physics Letters 92 (2008) 051914. 10.1063/1.2841636