Prof. Dr. Alfred Ludwig

Prof. Dr.-Ing. Alfred Ludwig studied mechanical engineering at the University of Karlsruhe, specializing in materials science and microsystems technology. In 1999 he received the title "Dr.-Ing." from the University of Karlsruhe for his research on nanoscale magnetoelastic multilayer coatings, carried out at the Institute of Materials Research of the Forschungszentrum Karlsruhe. He then moved to the caesar research center in Bonn, in the "Smart Materials" group, where he developed high-frequency magnetoelastic coatings and devices. From December 2002 to September 2007, he was junior professor for "Werkstoffe der Mikrotechnik" at the Faculty of Mechanical Engineering of the Ruhr University Bochum (RUB) and at the same time head of the caesar research group "Combinatorial Materials Science". From October 2007 to 2012, he received a Heisenberg Professorship of the German Research Foundation for "Materials of Microtechnology" at RUB. Since the end of 2012, he has been a chair holder at RUB. From 2011 to 2016, he was coordinator of the inter-faculty "Materials Research Department" at RUB. He initiated and organized the new research building ZGH (Center for Interfacially Dominated High Performance Materials), of which he is scientific director since 2019. His research interests include high-throughput processes and MEMS tools for materials science, nanoscale layers, multifunctional materials (e.g., conventional and ferromagnetic shape memory alloys), and new materials for energy applications (e.g., materials for solar water splitting, electrocatalysts, thermoelectrics, ...). He has published more than 340 articles, more than 300 of them in peer-reviewed journals. Since 2022 he is Director of the Research Center Future Energy Materials and Systems (RC FEMS). He is PI in a new ERC Synergy Grant project (DEMI) and spokesperson of the new SFB 1625 (both projects start in 2024).

https://www.mdi.ruhr-uni-bochum.de/mdi/index.html.en

Publications

  • 2005
2005
  • article
article2005A. LudwigJ. CaoJ. BruggerI. Takeuchi

MEMS tools for combinatorial materials processing and high-throughput characterization

A. Ludwig, J. Cao, J. Brugger, I. Takeuchi:
Measurement Science and Technology (2005)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-12344316140&doi=10.1088%2f0957-0233%2f16%2f1%2f015&partnerID=40&md5=bef21831eb11f38970791af7d02a2ae6https://dx.doi.org/10.1088/0957-0233/16/1/015
  • 2004
2004
  • article
article2004Alexis DebrayAlfred LudwigTarik BourouinaAkira AsaokaNicholas TiercelinGilbert ReyneTakahiko OkiEckhard QuandtHideo MuroHiroyuki Fujita

Application of a multilayered magnetostrictive film to a micromachined 2-D optical scanner

Alexis Debray, Alfred Ludwig, Tarik Bourouina, Akira Asaoka, Nicholas Tiercelin, Gilbert Reyne, Takahiko Oki, Eckhard Quandt, Hideo Muro, Hiroyuki Fujita:
Journal of Microelectromechanical Systems (2004)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-11144357318&doi=10.1109%2fJMEMS.2004.825534&partnerID=40&md5=fe639591a15da7e18b935e2c282bbcd4https://dx.doi.org/10.1109/JMEMS.2004.825534
2004
  • 2003
2003
  • conference
conference2003Philipp SmoleW. RuileC. KordenA. LudwigS. KrassnitzerP. Pongratz

Fabrication techniques for tunable surface acoustic wave resonators on giant ΔE layers

Philipp Smole, W. Ruile, C. Korden, A. Ludwig, S. Krassnitzer, P. Pongratz:
Proceedings of the IEEE Ultrasonics Symposium (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-4143116917&partnerID=40&md5=a2701d7df16b6cdd7edfb9a715fa9740
2003
  • conference
conference2003M. FrommbergerA. LudwigC. ZankeA. SehrbrockE. Quandt

High frequency magnetic properties of FeCoBSi/SiO2 and (FeCo/CoB)/SiO2 multilayer thin films

M. Frommberger, A. Ludwig, C. Zanke, A. Sehrbrock, E. Quandt:
Intermag 2003 - Program of the 2003 IEEE International Magnetics Conference (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84949504466&doi=10.1109%2fINTMAG.2003.1230930&partnerID=40&md5=99db2940920e1fc1dee47aee9ec219dfhttps://dx.doi.org/10.1109/INTMAG.2003.1230930
2003
  • article
article2003Michael FrommbergerAlfred LudwigAngelika SehrbrockEckhard Quandt

High-Frequency Magnetic Properties of FeCoBSi/SiO2 and (FeCo/CoB)/SiO2 Multilayer Thin Films

Michael Frommberger, Alfred Ludwig, Angelika Sehrbrock, Eckhard Quandt:
IEEE Transactions on Magnetics (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0141952974&doi=10.1109%2fTMAG.2003.816045&partnerID=40&md5=ff2c432d10076d78acebe4dd0355a5b2https://dx.doi.org/10.1109/TMAG.2003.816045
2003
  • article
article2003Alfred LudwigMichael FrommbergerMichael TewesEckhard Quandt

High-Frequency Magnetoelastic Multilayer Thin Films and Applications

Alfred Ludwig, Michael Frommberger, Michael Tewes, Eckhard Quandt:
IEEE Transactions on Magnetics (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0141988585&doi=10.1109%2fTMAG.2003.815894&partnerID=40&md5=d342b5385dd50b7178d8b013e85a0dd2https://dx.doi.org/10.1109/TMAG.2003.815894
2003
  • conference
conference2003P. SmoleW. RuileC. KordenA. LudwigE. QuandtS. KrassnitzerP. Pongratz

Magnetically tunable SAW-resonator

P. Smole, W. Ruile, C. Korden, A. Ludwig, E. Quandt, S. Krassnitzer, P. Pongratz:
Proceedings of the Annual IEEE International Frequency Control Symposium (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-1542275486&partnerID=40&md5=8a755dfbfd0147e7ceb86f179d9adbd5
2003
  • article
article2003M. FrommbergerCh. ZankeA. LudwigM. TewesE. Quandt

Processing and application of magnetoelastic thin films in high-frequency devices

M. Frommberger, Ch. Zanke, A. Ludwig, M. Tewes, E. Quandt:
Microelectronic Engineering (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0038020132&doi=10.1016%2fS0167-9317%2803%2900118-7&partnerID=40&md5=e0f0ebc09f866f3802c0133561c79fe8https://dx.doi.org/10.1016/S0167-9317(03)00118-7
2003
  • conference
conference2003H. RumpfJ. FeydtD. LewandowskiA. LudwigB. WinzekE. QuandtP. ZhaoM. Wuttig

Shape memory effect and magnetostriction of sputtered NiMnGa thin films

H. Rumpf, J. Feydt, D. Lewandowski, A. Ludwig, B. Winzek, E. Quandt, P. Zhao, M. Wuttig:
Proceedings of SPIE - The International Society for Optical Engineering (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0242442027&doi=10.1117%2f12.484689&partnerID=40&md5=016ff1ea81d89e04a0ed3e3c0a6a81c6https://dx.doi.org/10.1117/12.484689
2003
  • conference
conference2003E. LeclercA. DebrayN. TiercelinT. FujiiH. FujitaAlfred Ludwig

Silicon based optical scanner using PDMS as torsion springs

E. Leclerc, A. Debray, N. Tiercelin, T. Fujii, H. Fujita, Alfred Ludwig:
2003 IEEE/LEOS International Conference on Optical MEMS (2003)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946239780&doi=10.1109%2fOMEMS.2003.1233484&partnerID=40&md5=71975f712a633bf9480581305a7d9c62https://dx.doi.org/10.1109/OMEMS.2003.1233484
  • 2002
2002
  • conference
conference2002A. DebrayH. FujitaA. LudwigE. QuandtH. MuroT. OkiA. Asaoka

2D optical scanner with magnetostrictive actuation for industrial applications

A. Debray, H. Fujita, A. Ludwig, E. Quandt, H. Muro, T. Oki, A. Asaoka:
2002 IEEE/LEOS International Conference on Optical MEMs, OMEMS 2002 - Conference Digest (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963724032&doi=10.1109%2fOMEMS.2002.1031489&partnerID=40&md5=bdcc536050ae372695b770dc1a42d152https://dx.doi.org/10.1109/OMEMS.2002.1031489
2002
  • article
article2002A. LudwigM. TewesS. GlasmachersM. LöhndorfE. Quandt

High-frequency magnetoelastic materials for remote-interrogated stress sensors

A. Ludwig, M. Tewes, S. Glasmachers, M. Löhndorf, E. Quandt:
Journal of Magnetism and Magnetic Materials (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036543698&doi=10.1016%2fS0304-8853%2801%2900979-9&partnerID=40&md5=c72402b42a21fc9efd01f40da4a76b7chttps://dx.doi.org/10.1016/S0304-8853(01)00979-9
2002
  • article
article2002Tarik BourouinaEric LebrasseurGilbert ReyneAlexis DebrayHiroyuki FujitaAlfred LudwigEckhard QuandtHideo MuroTakahiko OkiAkira Asaoka

Integration of two degree-of-freedom magnetostrictive actuation and piezoresistive detection: Application to a two-dimensional optical scanner

Tarik Bourouina, Eric Lebrasseur, Gilbert Reyne, Alexis Debray, Hiroyuki Fujita, Alfred Ludwig, Eckhard Quandt, Hideo Muro, Takahiko Oki, Akira Asaoka:
Journal of Microelectromechanical Systems (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036687777&doi=10.1109%2fJMEMS.2002.800561&partnerID=40&md5=d76e4f4cd0403e71762afa7218f87ad6https://dx.doi.org/10.1109/JMEMS.2002.800561
2002
  • conference
conference2002Alfred LudwigMichael FrommbergerChristel ZankeStefan GlasmachersEckhard Quandt

Magnetoelastic thin films and multilayers for high-frequency applications

Alfred Ludwig, Michael Frommberger, Christel Zanke, Stefan Glasmachers, Eckhard Quandt:
Proceedings of SPIE - The International Society for Optical Engineering (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036029232&doi=10.1117%2f12.475010&partnerID=40&md5=2a0a58e94ed1362842b6a847d4fa8a6ahttps://dx.doi.org/10.1117/12.475010
2002
  • article
article2002T. DuenasA. SehrbrockM. LöhndorfA. LudwigJ. WeckerP. GrünbergE. Quandt

Micro-sensor coupling magnetostriction and magnetoresistive phenomena

T. Duenas, A. Sehrbrock, M. Löhndorf, A. Ludwig, J. Wecker, P. Grünberg, E. Quandt:
Journal of Magnetism and Magnetic Materials (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036543836&doi=10.1016%2fS0304-8853%2801%2900975-1&partnerID=40&md5=643ddf080e71e3bf490555aa392ac466https://dx.doi.org/10.1016/S0304-8853(01)00975-1
2002
  • conference
conference2002M. LöhndorfT. Duenas-LockwoodA. LudwigM. RührigD. BürglerP. GrünbergE. Quandt

Novel strain sensors based on magnetostrictive GMR/TMR structures

M. Löhndorf, T. Duenas-Lockwood, A. Ludwig, M. Rührig, D. Bürgler, P. Grünberg, E. Quandt:
INTERMAG Europe 2002 - IEEE International Magnetics Conference (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85017231685&doi=10.1109%2fINTMAG.2002.1000624&partnerID=40&md5=e315af65d914369583bde80cd72e0da6https://dx.doi.org/10.1109/INTMAG.2002.1000624
2002
  • article
article2002Alfred LudwigEckhard Quandt

Optimization of the ΔE effect in thin films and multilayers by magnetic field annealing

Alfred Ludwig, Eckhard Quandt:
IEEE Transactions on Magnetics (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036762511&doi=10.1109%2fTMAG.2002.802467&partnerID=40&md5=93df445624559e26e0a35030f1b03af1https://dx.doi.org/10.1109/TMAG.2002.802467
2002
  • conference
conference2002A. LudwigE. Quandt

Optimization of the ΔE-effect in thin films and multilayers by magnetic field annealing

A. Ludwig, E. Quandt:
INTERMAG Europe 2002 - IEEE International Magnetics Conference (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85017208117&doi=10.1109%2fINTMAG.2002.1000626&partnerID=40&md5=1c053a95f9297d70c1c7206c85d54194https://dx.doi.org/10.1109/INTMAG.2002.1000626
2002
  • article
article2002M. TewesM. LöhndorfA. LudwigE. Quandt

Remote interrogated magnetoelastic sensors; [Berührungslose magnetoelastische sensoren]

M. Tewes, M. Löhndorf, A. Ludwig, E. Quandt:
KGK-Kautschuk und Gummi Kunststoffe (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036026782&partnerID=40&md5=910220d485c4299b0371c93cbae11dac
2002
  • article
article2002M. LöhndorfT.A. DuenasAlfred LudwigManfred RührigJ. WeckerD. BürglerP. GrünbergEckhard Quandt

Strain sensors based on magnetostrictive GMR/TMR structures

M. Löhndorf, T.A. Duenas, Alfred Ludwig, Manfred Rührig, J. Wecker, D. Bürgler, P. Grünberg, Eckhard Quandt:
IEEE Transactions on Magnetics (2002)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036763036&doi=10.1109%2fTMAG.2002.802466&partnerID=40&md5=edef1d82b82557e7bbc2abdb2a53b827https://dx.doi.org/10.1109/TMAG.2002.802466
  • 2001
2001
  • article
article2001A. LudwigM. LöhndorfM. TewesE. Quandt

Magnetoelastic thin films for high-frequency applications

A. Ludwig, M. Löhndorf, M. Tewes, E. Quandt:
IEEE Transactions on Magnetics (2001)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035386331&doi=10.1109%2f20.951276&partnerID=40&md5=61c3fb4136ffa789f8e673f806fbd30fhttps://dx.doi.org/10.1109/20.951276
2001
  • article
article2001Michael TewesMarkus LöhndorfAlfred LudwigEckhard Quandt

Remotely Interrogated Magnetoelastic Sensors; [Berührungslose Magnetoelastische Sensoren]

Michael Tewes, Markus Löhndorf, Alfred Ludwig, Eckhard Quandt:
Technisches Messen (2001)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0042833026&partnerID=40&md5=6a686019974a68ec34b031ccd4da1262
  • 2000
2000
  • article
article2000Alfred LudwigEckhard Quandt

Giant magnetostrictive thin films for applications in microelectromechanical systems (invited)

Alfred Ludwig, Eckhard Quandt:
Journal of Applied Physics (2000)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0000819018&doi=10.1063%2f1.373132&partnerID=40&md5=3b6eef8553ecac66915e830a4f325c6dhttps://dx.doi.org/10.1063/1.373132
2000
  • article
article2000W. PflegingA. LudwigK. SeemannR. PreuH. MäcKelS.W. Glunz

Laser micromachining for applications in thin film technology

W. Pfleging, A. Ludwig, K. Seemann, R. Preu, H. MäcKel, S.W. Glunz:
Applied Surface Science (2000)

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033872463&doi=10.1016%2fS0169-4332%2899%2900468-7&partnerID=40&md5=631d69ffe4ae88781b5ae1f7b64b7256https://dx.doi.org/10.1016/S0169-4332(99)00468-7