Funding period: 2021 – 2024

Project leader: Martina Müller

Scientific staff: Dr. Seema Seema, Pia Maria Düring, Andreas Fuhrberg, Oliver Rehm

Former members: Paul Rosenberger

The goal of this project is to explore the intrinsic role of spin fluctuations in novel 2D oxide materials, which are now emerging as exciting alternatives to the 'classical' 2D van der Waals systems. Advanced crystal engineering is employed to generate 2D magnetism in layered and freestanding magnetic oxide systems. Using complementary magnetic microscopy probes, the goal is to pinpoint their spatial and temporal characteristics, to imaging the critical spin fluctuations at magnetic phase transitions and to assess their emergence as a decisive criterion for 2D-type magnetic ordering. Efforts will be focused on unravelling the microscopic mechanisms underlying the stochastic spin phenomena in 2D magnetic solids.

List of publications

Current preprints

• Single-crystalline YIG nanoflakes with uniaxial in-plane anisotropy and diverse crystallographic orientations
  R. Hartmann, Seema, I. Soldatov, M. Lammel, D. Lignon, X. Ai, G. Kiliani, R. Schäfer, A. Erb, R. Gross, J. Boneberg, M. Müller, S. Goennenwein, E. Scheer, and A. Di Bernardo
  arXiv: 2309.12477 - published 21 September 2021
  related also to project B01

2024

• Tunable 2D Electron- and 2D Hole States Observed at Fe/SrTiO3 Interfaces
  P. M. Düring, P. Rosenberger, L. Baumgarten, F. Alarab, F. Lechermann, V. N. Strocov, M. Müller
  Adv. Mater. 2024, 2309217 - published 21 January 2024

2023

• Modulation of the transient magnetization of an EuO/Co bilayer tuned by optical excitation
  D. Mönkenbüscher, P. Rosenberger, F. Mertens, R. Adam, C. M. Schneider, U. Parlak, M. Müller, M. Cinchetti
  Adv. Mater. Interfaces 2023, 2300236 - published 14 July 2023

2022

• Temperature-dependent spin-resolved electronic structure of EuO thin films
  T. Heider, T. Gerber, O. Köksal, M. Eschbach, E. Mły´nczak, P. Lömker, P. Gospodaric, M. Gehlmann, M. Plötzing, R. Pentchev, L. Plucinski, C. M. Schneider, and M. Müller
  Phys. Rew B 106, 054424 - published 19 August 2022
   
• Hard x-ray photoelectron spectroscopy of tunable oxide interfaces

  M. Müller, P. Lömker, P. Rosenberger, M. Hussein Hamed, D. N. Mueller, R. A. Hinz, T. Szyjka, and L. Baumgarten
  J. Vac. Sci. Technol. A 40, 013215 – published 27 December 2021

2021

•  Active participation of “inert” YSZ substrates on interface formation in Fe3O4/YSZ heterostructures
  Mai Hussein Hamed, David N. Mueller, Martina Müller
  Applied Surface Science Advances 6, 100132 – published 7 July 2021

Further Publications

• Redox-controlled epitaxy and magnetism of oxide heterointerfaces: EuO / SrTiO₃
  P. Lömker and M. Müller
  Phys. Rev. Materials 3, 061401(R) – published 20 June 2019
   
• Tunable Magnetic Phases at Fe₃O₄/SrTiO₃ Oxide Interfaces
  M. H. Hamed, R. A. Hinz, P. Lömker, M. Wilhelm, A. Gloskovskii, P. Bencok, C. Schmitz-Antoniak, H. Elnaggar, C. M. Schneider, and M. Müller
  ACS Appl. Mat. Interfaces 11, 7, 7576 - published 23 January 2019
   
• Thermal phase design of ultrathin magnetic iron oxide films: from Fe3O4to γ-Fe2O3 and FeO
  M. H. Hamed, D. N. Mueller,  and M. Mülller
  J. Mater. Chem. C 8, 1335 - published 13 December 2019