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WMI Research

Superconductivity and Superfluidity
Superconducting Quantum Circuits and Nanomechanics
Magnetism and Spintronics
Organic Metals

SFB 631
TRR 80
SPP 1458
SPP 1538
SPP 1601

Magnetism & Spintronics: Oxide Thin Films for Spintronics


Thin Film Laser Epitaxy by Laser-MBE

Laser molecular beam epitaxy (laser-MBE), also known as pulsed laser deposition (PLD), allows growing oxide thin films with crystalline quality approaching semiconductor standards. Moreover, in close analogy to the well-known GaAs/AlAs heteroepitaxy it is possible to grow complex heterostructures composed of different oxides on suitable substrates in a layer-by-layer or block-by-block mode. We are steadily working on ...

  • Fabrication of high-quality epitaxial oxide thin films and heterostructures on different single crystalline substrates
  • Development of multifunctional materials and devices based on heteroepitaxial oxide thin film multilayers
Recent publications

Origin of the spin Seebeck effect probed by temperature dependent measurements in Gd3Fe5O12
Stephan Geprägs, Andreas Kehlberger, Tomek Schulz, Christian Mix, Francesco Della Coletta, Sibylle Meyer, Akashdeep Kamra, Matthias Althammer, Gerhard Jakob, Hans Huebl, Rudolf Gross, Sebastian T.B. Goennenwein, Mathias Kläui
Nature Communications 7, 10452 (2016)


Laser molecular beam epitaxy of ZnO thin films and heterostructures
M. Opel, S. Geprägs, M. Althammer, T. Brenninger, R. Gross
J. Phys. D: Appl. Phys. 47, 034002 (2014)


Y3Fe5O12 (png 43k)

Rare-Earth Iron Garnets

Yttrium iron garnet (YIG, Y3Fe5O12) is one of the rare electrically insulating ferromagnets. It has become particularly important for the investigation of pure spin currents since the spin transport in YIG is not influenced by a simultaneous propagation of charges. Replacing Y3+ by magnetic rare earth elements like Gd3+ introduces another magnetic sublattice and causes magnetic compensation effects. We investigate ...

  • Magnetic structure of rare earth (RE) iron garnets (RE3Fe5O12)
  • Proximity magnetism of normal metals (e.g. Pt) deposited on RE3Fe5O12
  • RE3Fe5O12 as a source or sink for spin currents
Recent publications

Untangling the contributions of cerium and iron to the magnetism of Ce-doped yttrium iron garnet
Blai Casals, Marina Espínola, Rafael Cichelero, Stephan Geprägs, Matthias Opel, Rudolf Gross, Gervasi Herranz, Josep Fontcuberta
Appl. Phys. Lett. 108, 102407 (2016)


Investigation of Induced Pt Magnetic Polarisation in Pt/Y3Fe5O12 Bilayers
Stephan Geprägs, Sibylle Meyer, Stephan Altmannshofer, Matthias Opel, Fabrice Wilhelm, Andrei Rogalev, Rudolf Gross, Sebastian T.B. Goennenwein
ESRF Highlights 2013, 88-89 (2014)