C10 – Control of magnetic nanostructures by spin currents and thermal gradients

Funding period: 01/2012 – 12/2019

Principal investigator: Ulrich Nowak

Scientific staff: Martin Evers, Denise Hinzke, Stefan Gerlach, Ulrike Ritzmann, Frank Schlickeiser, Rocio Yanes-Diaz, Markus Weißenhofer

In a magnetic material temperature gradients do not solely cause phononic thermal transport but also a magnonic contribution. These magnonic spin currents can lead to spin transfer torque effects without a charge current. By means of multi-scale computer simulations we want to explore innovative ways to control magnetic textures with magnonic spin currents on a nanometre scale. The investigated magnetic textures will include domain walls in ferromagnets as well as ferrimagnets and antiferromagnets and chiral spin structures as, e. g., spin spirals and skyrmions, with promising properties for future applications.

For further information please also refer to the group website: AG Nowak

List of publications

2019 

  • M. Weißenhofer and U. Nowak
    Orientation-dependent current-induced motion of skyrmions with various topologies
    Phys. Rev. B 99, 224430 (2019) - DOI: 10.1103/PhysRevB.99.224430
  • J. Zázvorka, F. Jakobs, D. Heinze, N. Keil, S. Kromin, S. Jaiswal, K. Litzius, G. Jakob, P. Virnau, D. Pinna, K. Everschor-Sitte, L. Rózsa, A. Donges, U. Nowak, and M. Kläui
    Thermal skyrmion diffusion used in a reshuffler device
    Nat. Nanotechnol. 14, 658 (2019) - DOI: 10.1038/s41565-019-0436-8
  • M. Aßmann and U. Nowak
    Spin-lattice relaxation beyond Gilbert damping
    J. Magn. Magn. Mater. 469 (2019) - DOI: 10.1016/j.jmmm.2018.08.034

2018

  •  M. Evers, C. A. Müller, U. Nowak
    Weak localization of magnons in chiral magnets
    Phys. Rev. B 97, 184423 (2018) - DOI: 10.1103/PhysRevB.97.184423
  • J. Cramer, F. Fuhrmann, U. Ritzmann, V. Gall, T. Niizeki, R. Ramos, Z. Qiu, D. Hou, T. Kikkawa, J. Sinova, U. Nowak, E. Saitoh, and M. Kläui
    Magnon detection using a ferroic collinear multilayer spin valve
    Nat. Comm. 9, 1089 (2018) - DOI: 10.1038/s41467-018-03485-5
    University press release
  • J. Cramer, U. Ritzmann, B. Dong, S. Jaiswal, Z. Qiu,  E. Saitoh, U. Nowak, and M. Kläui
    Spin transport across antiferromagnets induced by the spin Seebeck effect
    J. Phys. D. Appl. Phys. 51, 144004 (2018) - DOI: 10.1088/1361-6463/aab223

2017

  • L. Rózsa, U. Atxitia, and U. Nowak
    Temperature scaling of the Dzyaloshinsky-Moriya interaction in the spin wave spectrum
    Phys. Rev. B 96, 094436 (2017) - DOI: 10.1103/PhysRevB.96.094436
  • U. Atxitia, D. Hinzke, and U. Nowak
    Fundamentals and applications of the Landau–Lifshitz–Bloch equation
    J. Phys. D: Appl. Phys. 50, 033003 (2017) - DOI: 10.1088/1361-6463/50/3/033003
  • U. Ritzmann, D. Hinzke and U. Nowak
    Thermally induced magnon accumulation in two-sublattice magnets
    Phys. Rev. B 95, 054411 (2017) - DOI: 10.1103/PhysRevB.95.054411
  • L. Rózsa, K. Palotás, A. Deák, E. Simon, R. Yanes, L. Udvardi, L. Szunyogh, and U. Nowak
    Formation and stability of metastable skyrmionic spin structures with various topologies in an ultrathin film
    Phys. Rev. B 95, 094423 (2017) - DOI: 10.1103/PhysRevB.95.094423

2016

  • S. Selzer, U. Atxitia, U. Ritzmann, D. Hinzke, and Ulrich Nowak
    Inertia-free thermally driven domain-wall motion in antiferromagnets
    Phys. Rev. Lett. 117, 107201 (2016) - DOI: 10.1103/PhysRevLett.117.107201
  • L. Rózsa, A. Deák, E. Simon, R. Yanes, L. Udvardi, L. Szunyogh, and U. Nowak
    Skyrmions with attractive interactions in an ultrathin magnetic film
    Phys. Rev. Lett. 117, 157205 (2016) - DOI: 10.1103/PhysRevLett.117.157205

2015

  • M. Stärk, F. Schlickeiser, D. Nissen, B. Hebler, P. Graus, D. Hinzke, E. Scheer, P. Leiderer, M. Fonin, M. Albrecht, U. Nowak, and Jo. Boneberg
    Controlling the magnetic structure of Co/Pd thin films by direct laser interference patterning
    Nanotechnology, Vol. 26, (2015) - DOI: 10.1088/0957-4484/26/20/205302/
  • M. Evers, C. A. Müller, and U. Nowak
    Spin-wave localization in disordered magnets
    Phys. Rev. B 92, 014411 (2015) - DOI:10.1103/PhysRevB.92.014411
  • A. Kehlberger, U. Ritzmann, D. Hinzke, E.-J. Guo, J. Cramer, G. Jakob, M. C. Onbasli, D. H. Kim, C. A. Ross, M. B. Jungfleisch, B. Hillebrands, U. Nowak, and M. Kläui
    Length Scale of the Spin Seebeck Effect
    Phys. Rev. Lett. 115, 096602 (2015) - DOI: 10.1103/PhysRevLett.115.096602
  • U. Ritzmann, D. Hinzke, A. Kehlberger, E.-J. Guo, M. Kläui, and U. Nowak
    Magnetic field control of the spin Seebeck effect
    Phys. Rev. B 92, 174411 (2015) -DOI: 10.1103/PhysRevB.92.174411
  • G. Hasselberg, R. Yanes, D. Hinzke, P. Sessi, M. Bode, L. Szunyogh, and U. Nowak
    Thermal properties of a spin spiral: Manganese on tungsten(110)
    Phys. Rev. B 91, 064402 (2015) - DOI: 10.1103/PhysRevB.91.064402

2014

  • F. Schlickeiser, U. Ritzman, D. Hinzke, and U. Nowak
    Role of entropy in domain wall motion in thermal gradients
    Phys. Rev. Lett. 113, 097201 (2014) - DOI: 10.1103/PhysRevLett.113.097201
  • U. Ritzman, D. Hinzke, and U. Nowak
    Propagation of thermally induced magnonic spin currents
    Physical Review B 89, 024409 (2014) - DOI: 10.1103/PhysRevB.89.024409

2012

  • J. Heinen, O. Boulle, G. Malinowski, H. J. M. Sagten, B. Koopmans, C. Ulysse, G. Faini, D. Hinzke, and M. Kläui
    Determination of the spin-torque non-adiabaticity in perpendicularly magnetized nanowires
    J. Phys.: Condens. Matter 24, 024220 (2012) - DOI:10.1088/0953-8984/24/2/024220
  • R. F. L. Evans, D. Hinzke, U. Atxitia, U. Nowak, R.W. Chantrell, and O. Chubykalo-Fesenko
    Stochastic form of the Landau-Lifshitz-Bloch equation
    Phys. Rev. B85, 014433 (2012) - DOI: 10.1103/PhysRevB.85.014433
  • L. Balogh, K. Palotás, L. Udvardi, L. Szunyogh, and U. Nowak
    Theoretical study of magnetic domain walls through a cobalt nanocontact
    Phys. Rev. B86, 024406 (2012) - DOI: 10.1103/PhysRevB.86.024406

2011

  • D. Hinzke and U. Nowak
    Domain wall motion by the magnonic spin Seebeck effect
    Phys. Rev. Lett. 107, 027205 (2011) - DOI: 10.1103/PhysRevLett.107.027205
  • J. Heinen, D. Hinzke, O. Boulle, G. Malinowski, H. J. M. Sagten, B. Koopmans, C. Ulysse, G. Faini, and M. Kläui
    Extraction of the spin-torque non-adiabaticity from thermally activated domain wall hopping
    Appl. Phys. Lett. 99, 242501 (2011) - DOI: 10.1063/1.3663215
  • Martin P. Magiera, Lothar Brendel, Dietrich E. Wolf, and U. Nowak
    Spin waves cause nonlinear friction
    Europhys. Lett. 95, 17010 (2011) - DOI: 10.1209/0295-5075/95/17010