Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 10: Poster Session: Superconductivity
TT 10.23: Poster
Montag, 14. März 2011, 14:00–18:00, P4
75As NMR Study of Iron Pnictides RFeAsO1−xFx — •Marc Lux1, Damian Rybicki1, Thomas Meißner1, Jürgen Haase1, Grant Williams2, and Chong Shen2 — 1Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany — 2The MacDiarmid Institute, Industrial Research, P.O. Box 31310, Lower Hutt 5040, New Zealand
Since the recent discovery of superconductivity in iron pnictides they continuously attract an enormous amount of attention. Nuclear magnetic resonance (NMR) is a perfect tool to study their local properties through measurements of Knight shifts and relaxation rates. We present a 75As NMR study of the RFeAsO1−xFx family. We show temperature dependence of Knight shift, spin-spin and spin-lattice relaxation rates as a function of fluorine doping and orientation of the crystal structure with respect to the external magnetic field. The results are discussed and compared to other families of iron pnictides.