Thomas Lottermoser


Last Name

Lottermoser

First Name

Thomas

ORCID

0000-0002-2941-7446

Organisational unit

03918 - Fiebig, Manfred / Fiebig, Manfred

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Publications1 - 10 of 71
  • Reversible long-range domain wall motion in an improper ferroelectric
    Item type: Journal Article
    Zahn, Manuel; Müller, Aaron Merlin; Kelley, Kyle P.; et al. (2025)
    Nature Communications
    Reversible ferroelectric domain wall movements beyond the 10 nm range associated with Rayleigh behavior are usually restricted to specific defect-engineered systems. Here, we demonstrate that such long-range movements naturally occur in the improper ferroelectric ErMnO3 during electric-field-cycling. We study the electric-field-driven motion of domain walls, showing that they readily return to their initial position after having traveled distances exceeding 250 nm. By applying switching spectroscopy band-excitation piezoresponse force microscopy, we track the domain wall movement with nanometric spatial precision and analyze the local switching behavior. Phase field simulations show that the reversible long-range motion is intrinsic to the hexagonal manganites, linking it to their improper ferroelectricity and topologically protected structural vortex lines, which serve as anchor point for the ferroelectric domain walls. Our results give new insight into the local dynamics of domain walls in improper ferroelectrics and demonstrate the possibility to reversibly displace domain walls over much larger distances than commonly expected for ferroelectric systems in their pristine state, ensuring predictable device behavior for applications such as tunable capacitors or sensors.
  • Magnetoelectric Effects in Multiferroic Manganites
    Item type: Conference Paper
    Fiebig, Manfred; Lottermoser, Thomas; Lonkai, Thomas; et al. (2005)
    Journal of Magnetism and Magnetic Materials
    A variety of bulk as well as local magnetoelectric effects are observed in RMnO3 compounds with R ¼ Sc; Y;In; Ho; Er; Tm; Yb; Lu due to the coexistence of ferroelectric and multiple magnetic ordering. On the one hand, ‘gigantic’ magnetoelectric bulk effects, where magnetic phase control is exerted by applied electric or magnetic fields, are revealed. On the other hand, interaction of domain walls leads to a coupling of ferroelectric and antiferromagnetic domains, and a contribution to the linear magnetoelectric effect that is induced in the antiferromagnetic domain walls is identified. The effects are observed by linear and nonlinear magnetooptical techniques and explained microscopically by the interplay of magnetic exchange, wall magnetization, and ferroelectric distortion
  • Probing of Ferroelectric Surface and Bulk Domains in Ferroelectric RMnO3 (R = Y, Ho) by Second Harmonic Generation
    Item type: Journal Article
    Fiebig, Manfred; Fröhlich, Dietmar; Lottermoser, Thomas; et al. (2002)
    Physical Review B
  • LaMnO3∕SrMnO3 interfaces with coupled charge-spin-orbital modulation
    Item type: Journal Article
    Yamada, Hiroyuki; Kawasaki, M.; Lottermoser, Thomas; et al. (2006)
    Applied Physics Letters
  • Incompatible magnetic order in multiferroic hexagonal DyMnO3
    Item type: Journal Article
    Wehrenfennig, Christian; Meier, Dennis; Lottermoser, Thomas; et al. (2010)
    Physical Review B
  • The evolution of multiferroics
    Item type: Review Article
    Fiebig, Manfred; Lottermoser, Thomas; Meier, Dennis; et al. (2016)
    Nature Reviews Materials
  • Photoinduced Instability of Magnetic Structure in Hexagonal ScMnO3
    Item type: Journal Article
    Fiebig, Manfred; Fröhlich, Dietmar; Lottermoser, Thomas; et al. (2002)
    Physical Review B
  • Magnetoelectric Behaviour of Domain Walls in Multiferroic HoMnO3
    Item type: Journal Article
    Lottermoser, Thomas; Fiebig, Manfred (2004)
    Physical Review B
  • Giant Coupling of Second Harmonic Generation to a Multiferroic Polarization
    Item type: Journal Article
    Lottermoser, Thomas; Meier, Dennis; Pisarev, Roman V.; et al. (2009)
    Physical Review B
  • Magnetoelectric domain engineering from micrometer to Ångstrøm scales
    Item type: Journal Article
    Giraldo Castaño, Leidy Marcela; Simonov, Arkadiy; Sim, Hasung; et al. (2024)
    Physical Review Research
    The functionality of magnetoelectric multiferroics depends on the formation, size, and coupling of their magnetic and electric domains. Knowing the parameters guiding these criteria is a key effort in the emerging field of magnetoelectric domain engineering. Here we show, using a combination of piezoresponse-force microscopy, nonlinear optics, and x-ray scattering, that the correlation length setting the size of the ferroelectric domains in the multiferroic hexagonal manganites can be engineered from the micron range down to a few unit cells under the substitution of Mn3+ ions with Al3+ ions. The magnetoelectric coupling mechanism between the antiferromagnetic Mn3+ order and the distortive-ferroelectric order remains intact even at substantial replacement of Mn3+ by Al3+. Hence, chemical substitution proves to be an effective tool for domain-size engineering in one of the most studied classes of multiferroics.
Publications1 - 10 of 71