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EnglishAmong the widely studied superconducting iron-pnictide compounds belonging to the Ln1111 family (with Ln a lanthanide), a systematic investigation of the crossover region between the superconducting and the antiferromagnetic phase for the Ln = Nd case has been missing. We fill this gap by focusing on the intermediate doping regime of NdFeAsO1−xFx by means of dc-magnetometry and muon-spin spectroscopy (μSR) measurements. The long-range order we detect at low fluorine doping is replaced by short-range magnetic interactions at x=0.08, where also superconductivity appears. In this case, longitudinal-field μSR experiments show clear evidence of slow magnetic fluctuations that disappear at low temperatures. This fluctuating component is ascribed to the glassy-like character of the magnetically ordered phase of NdFeAsO at intermediate fluorine doping.
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| Titolo: | Slow magnetic fluctuations and superconductivity in fluorine-doped NdFeAsO | |
| Autori: | ||
| Data di pubblicazione: | 2015 | |
| Rivista: | ||
| Abstract: | Among the widely studied superconducting iron-pnictide compounds belonging to the Ln1111 family (with Ln a lanthanide), a systematic investigation of the crossover region between the superconducting and the antiferromagnetic phase for the Ln = Nd case has been missing. We fill this gap by focusing on the intermediate doping regime of NdFeAsO1−xFx by means of dc-magnetometry and muon-spin spectroscopy (μSR) measurements. The long-range order we detect at low fluorine doping is replaced by short-range magnetic interactions at x=0.08, where also superconductivity appears. In this case, longitudinal-field μSR experiments show clear evidence of slow magnetic fluctuations that disappear at low temperatures. This fluctuating component is ascribed to the glassy-like character of the magnetically ordered phase of NdFeAsO at intermediate fluorine doping. | |
| Handle: | http://hdl.handle.net/11567/819701 | |
| Appare nelle tipologie: | 01.01 - Articolo su rivista |
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