First-order structural transition in the magnetically ordered phase of Fe1.13Te

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • S. Rößler - , Max Planck Institute for Chemical Physics of Solids (Autor:in)
  • Dona Cherian - , IISc: Indian Institute of Science (Autor:in)
  • W. Lorenz - , Technische Universität Dresden (Autor:in)
  • M. Doerr - , Professur für Experimentalphysik (Autor:in)
  • C. Koz - , Max Planck Institute for Chemical Physics of Solids (Autor:in)
  • C. Curfs - , European Synchrotron Radiation Facility (Autor:in)
  • Yu Prots - , Max Planck Institute for Chemical Physics of Solids (Autor:in)
  • U. K. Rößler - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • U. Schwarz - , Max Planck Institute for Chemical Physics of Solids (Autor:in)
  • Suja Elizabeth - , IISc: Indian Institute of Science (Autor:in)
  • S. Wirth - , Max Planck Institute for Chemical Physics of Solids (Autor:in)

Abstract

Specific heat, resistivity, magnetic susceptibility, linear thermal expansion (LTE), and high-resolution synchrotron x-ray powder diffraction investigations of single crystals Fe1+yTe (0.06 ≤y≤ 0.15) reveal a splitting of a single, first-order transition for y≤ 0.11 into two transitions for y ≤ 0.13. Most strikingly, all measurements on identical samples Fe1.13Te consistently indicate that, upon cooling, the magnetic transition at TN precedes the first-order structural transition at a lower temperature Ts. The structural transition in turn coincides with a change in the character of the magnetic structure. The LTE measurements along the crystallographic c axis display a small distortion close to TN due to a lattice striction as a consequence of magnetic ordering, and a much larger change at Ts. The lattice symmetry changes, however, only below Ts as indicated by powder x-ray diffraction. This behavior is in stark contrast to the sequence in which the phase transitions occur in Fe pnictides.

Details

OriginalspracheEnglisch
Aufsatznummer174506
FachzeitschriftPhysical review. B
Jahrgang84
Ausgabenummer17
PublikationsstatusVeröffentlicht - 8 Nov. 2011
Peer-Review-StatusJa

Externe IDs

Scopus 82455217203

Schlagworte

Schlagwörter

  • Magnetostriktion, Magnetische Struktur, Phasenübergang