Funding period: 2021 – 2024

Project leader: Sebastian T. Goennenwein

Scientific staff: Xianyue Ai, Michaela Lammel, Nadine Nabben, Sebastian Sailer, Luise Siegl, Gregor Skobjin

This project experimentally addresses fluctuation phenomena in spin transport. On the one hand, we intend to measure the shot noise associated with pure spin current flow in magnet/metal heterostructures. We will search for signatures of magnon squeezing, magnon correlation lengths and ultimately magnon condensation in the shot noise, as predicted by theory. On the other hand, we will correlate transverse electrical voltage fluctuations (Hall noise) and magnetization fluctuations in magnetic thin films, aiming to unravel the impact of magnetic exchange coupling and topological effects on magnetotransport noise phenomena.

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
  also related to project B03
   
• Anomalous Nernst effect in perpendicularly magnetised τ-MnAl thin films
  D. Scheffler, S. Beckert, H. Reichlova, T. G. Woodcock, S.T.B. Goennenwein, A. Thomas
  arXiv:2307.03458 - published 7 July 2023
   
• Chiral phonons and phononic birefringence in ferromagnetic metal - bulk acoustic resonator hybrids
  M. Müller, J. Weber, F. Engelhardt, V. A. S. V. Bittencourt, T. Luschmann, M. Cherkasskii, S.T.B. Goennenwein, S. V. Kusminskiy, S. Geprägs, R. Gross, M. Althammer, and H. Huebl
  arXiv:2303.08429 - published 15 March 2023 
  also related to project B03
   
• Aluminiumsubstituierte Yttrium-Eisen-Granat-Dünnschichten mit reduzierter Curie-Temperatur
  D. Scheffler, O. Steuer, S. Zhou, L. Siegl, S.T.B. Goennenwein, M. Lammel
  arXiv:2302.10517 - published 21 February 2023

2024

• Lateral solid phase epitaxy of yttrium iron garnet
  S. Sailler, D. Pohl, H. Schlörb, B. Rellinghaus, A. Thomas, S. T. B. Goennenwein, and M. Lammel
  Phys. Rev. Materials 8, L020402 – published 29 February 2024

2023

• Electrical detectability of magnon-mediated spin current shot noise
  L. Siegl, M. Lammel, A. Kamra, H. Huebl, W. Belzig, and S. T. B. Goennenwein
  Phys. Rev. B 108, 144420 – published 18 October 2023
  also related to project A03

2022

• Magnetization dynamics affected by phonon pumping
  R. Schlitz, L. Siegl, T. Sato, W. Yu, G. E. W. Bauer, H. Huebl, and S. T. B. Goennenwein
  Phys. Rev. B 106, 014407 – Published 11 July 2022

Further Publications

• Experimental Test of the Spin Mixing Interface Conductivity Concept
  M. Weiler, M. Althammer, M. Schreier, J. Lotze, M. Pernpeintner, S. Meyer, H. Huebl, R. Gross, A. Kamra, J. Xiao, Y.-T. Chen, H. Jiao, G. E. W. Bauer, and S. T. B. Goennenwein
  Phys. Rev. Lett. 111, 176601 – published 23 October 2013
   
• Magnon-mediated spin current noise in ferromagnet | nonmagnetic conductor hybrids
  A. Kamra and W. Belzig
  Phys. Rev. B 94, 014419 – published 18 July 2016
   
• All Electrical Access to Topological Transport Features in Mn1.8PtSn Films
  R. Schlitz, P. Swekis, A. Markou, H. Reichlova, M. Lammel, J. Gayles, A. Thomas, K. Nielsch, C. Felser, and S. T. B. Goennenwein
  Nano Lett. 19, 4, 2366–2370 - published 7 March 2019