Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 98: Poster Session: Superconductivity
TT 98.8: Poster
Donnerstag, 15. März 2018, 15:00–19:00, Poster B
Magnetic and structural phase transition in Fe(1+y)Te — •Maik Barth, Kai Grube, Sebastian Kuntz, Thomas Wolf, Michael Merz, and Frank Weber — Institute for Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
To verify the established phase diagram of Fe(1+y)Te [1], we studied the temperature-dependent structural and magnetic properties on single crystals with an Fe content between 1.08 and 1.19. Independent of the excess Fe content, a magnetic transition from paramagnetic to antiferromagnetic is observed around TN ≈ 60 K. The lattice, on the other hand, undergoes a structural phase transition from tetragonal to monoclinic for Fe contents below 1.11 while a structural phase transition from tetragonal to orthorhombic is observed for Fe contents above 1.13; in the range between 1.11 and 1.13 a mixture of both phases appears. Moreover, the order of the structural phase transition changes continously from first to second order when going from 1.08 to 1.19. The structural characterization was done using x-ray diffraction, the magnetic measurements by utilizing a MPMS with a SQUID.
Koz et al., Phys. Review B 88, 094509 (2013)