Interplay of magnetism and superconductivity in EuFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$ single crystals probed by muon spin rotation and ${}^{57}$Fe M\'ossbauer spectroscopy
| Autor: | J. Spehling, Philipp Gegenwart, Sirko Kamusella, Rajib Sarkar, Hans-Henning Klauss, Hubertus Luetkens, Philipp Materne, Til Goltz, Hirale S. Jeevan |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Superconductivity
History Materials science Condensed matter physics Magnetism Condensed Matter - Superconductivity chemistry.chemical_element Muon spin spectroscopy Coupling (probability) Rotation Computer Science Applications Education chemistry Mössbauer spectroscopy Antiferromagnetism ddc:530 Condensed Matter::Strongly Correlated Electrons Europium |
| Popis: | We present our results of a local probe study on EuFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$ single crystals with $x$=0.13, 0.19 and 0.28 by means of muon spin rotation and ${}^{57}$Fe M\"ossbauer spectroscopy. We focus our discussion on the sample with $x$=0.19 viz. at the optimal substitution level, where bulk superconductivity ($T_{\text{SC}}=28$ K) sets in above static europium order ($T^{\text{Eu}}=20$K) but well below the onset of the iron antiferromagnetic (AFM) transition ($\sim$100 K). We find enhanced spin dynamics in the Fe sublattice closely above $T_{\text{SC}}$ and propose that these are related to enhanced Eu fluctuations due to the evident coupling of both sublattices observed in our experiments. Comment: Contribution to the 13th International Conference on Muon Spin Rotation, Relaxation and Resonance (MuSR2014) |
| Databáze: | OpenAIRE |
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