First-order structural transition in the magnetically ordered phase of Fe1.13Te
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
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
Originalsprache | Englisch |
---|---|
Aufsatznummer | 174506 |
Fachzeitschrift | Physical review. B |
Jahrgang | 84 |
Ausgabenummer | 17 |
Publikationsstatus | Veröffentlicht - 8 Nov. 2011 |
Peer-Review-Status | Ja |
Externe IDs
Scopus | 82455217203 |
---|
Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- Magnetostriktion, Magnetische Struktur, Phasenübergang