H. Ulbrich
University of Cologne
5 Papers
12 Citations
H. Ulbrich is an academic researcher from University of Cologne. The author has contributed to research in topics: Irreducible representation & Magnetic structure. The author has an hindex of 5, co-authored 5 publications.
Chat about Author
Papers
Magnetic structure and magnon dispersion in LaSrFeO 4
TL;DR: In this paper, elastic and inelastic neutron scattering data on LaSrFeO were used to confirm the known magnetic structure with the magnetic moments lying in the tetragonal basal plane, but their macroscopic and neutron diffraction data do not reveal any additional magnetic phase transition connected to a spin reorientation or to a redistribution of two irreducible representations.
21
Evidence for charge orbital and spin stripe order in an overdoped manganite.
H. Ulbrich,D. Senff,Paul Steffens,O. Schumann,Yvan Sidis,Pascal Reutler,A. Revcolevschi,Markus Braden +7 more
TL;DR: Overdoped La0.42Sr1.58MnO4 exhibits a complex ordering of charges, orbitals, and spins that points to a stripe arrangement in which ferromagnetic zigzag chains are disrupted by excess Mn(4+).
Magnetic order, transport and infrared optical properties in the A CrO 3 system ( A = Ca, Sr, and Pb)
A. C. Komarek,T. Möller,M. Isobe,Y. Drees,H. Ulbrich,Masaki Azuma,M. T. Fernandez-Diaz,Anatoliy Senyshyn,Anatoliy Senyshyn,M. Hoelzel,M. Hoelzel,Gilles André,Y. Ueda,Markus Grüninger,Markus Braden +14 more
TL;DR: In this paper, a detailed analysis of the infrared optical properties of polycrystalline CaCrO${}_{3}$ which is found to be metallic along all crystallographic directions is presented.
Spin-wave excitations in the ferromagnetic metallic and in the charge-, orbital-, and spin-ordered states in Nd 1 − x Sr x MnO 3 with x ≈ 0.5
TL;DR: Inelastic neutron-scattering experiments on single crystals of Nd${}{1\ensuremath{-}x}$Sr${}_{x} $MnO${}-3}$ with $x = 0.49$ and $x= 0.50$ magnetic excitations were conducted in this paper.
Hourglass dispersion in overdoped single-layered manganites.
TL;DR: The incommensurate stripelike magnetic ordering in two single-layered manganites is found to exhibit an hourglasslike excitation spectrum very similar to that seen in various cuprates superconductors, but only for sufficiently short correlation lengths.