ISIS Neutron and Muon Source Data Journal

Enhancement of anomalous low-frequency fluctuations in Mn-doped La1-yYyFeAsO0.89F0.11 superconductors

Abstract: Understanding the normal phase behaviour of the iron based superconductors is very important in order to shed new light on the physics of these complex materials. Mn impurities substitution on the Fe site in optimally electron doped La1-yYyLaFeAsO0.89F0.11 leads to a very rapid drop of Tc so that even a small amount of Mn is enough to completely suppress the superconductivity. 19F nuclear magnetic resonance spin-lattice relaxation time (1/T1) revealed the presence of very slow (MHz range) spin fluctuations, at temperatures above Tc, whose amplitude increase with Mn content. We thereby propose a ZF and LF muon spin rotation investigation of the low energy dynamics developing in the normal state of these materials to complement our 19F NMR studies.

Principal Investigator: Professor Pietro Carretta
Experimenter: Dr Giacomo Prando
Experimenter: Dr Sabine Wurmehl
Experimenter: Dr Matteo Moroni
Experimenter: Mr Filippo Caracciolo
Experimenter: Professor Samuele Sanna
Local Contact: Dr Mark Telling

DOI: 10.5286/ISIS.E.RB1620216

ISIS Experiment Number: RB1620216

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Pietro Carretta et al; (2016): Enhancement of anomalous low-frequency fluctuations in Mn-doped La1-yYyFeAsO0.89F0.11 superconductors, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620216

Data is released under the CC-BY-4.0 license.