In the present study, the local atomic structure of a Nb3Sn superconductor sample has been probed by X-ray absorption fine structure (XAFS) as a function of hydrostatic pressure (from ambient up to 26 GPa) using a diamond anvil cell set-up. The analysis of the Nb-K edge extended X-ray absorption fine structure (EXAFS) data was carried out combining standard multi shell structural refinement and reverse Monte Carlo method to provide detailed in situ characterization of the pressure-induced evolution of the Nb local structure in Nb3Sn. The results highlight a complex evolution of Nb chains at the local atomic scale, with a peculiar correlated displacement of Nb-Nb and Nb-Nb-Nb configurations. Such a local effect appears related to anomalies evidenced by X-ray diffraction in other superconductors belonging to the same A15 crystallographic structure.

Schiesaro, I., Anzellini, S., Loria, R., Torchio, R., Spina, T., Flukiger, R., et al. (2021). Anomalous behavior in the atomic structure of Nb3Sn under high pressure. CRYSTALS, 11(4), 331 [10.3390/cryst11040331].

Anomalous behavior in the atomic structure of Nb3Sn under high pressure

Schiesaro I.;Loria R.;Silva E.;Meneghini C.
2021-01-01

Abstract

In the present study, the local atomic structure of a Nb3Sn superconductor sample has been probed by X-ray absorption fine structure (XAFS) as a function of hydrostatic pressure (from ambient up to 26 GPa) using a diamond anvil cell set-up. The analysis of the Nb-K edge extended X-ray absorption fine structure (EXAFS) data was carried out combining standard multi shell structural refinement and reverse Monte Carlo method to provide detailed in situ characterization of the pressure-induced evolution of the Nb local structure in Nb3Sn. The results highlight a complex evolution of Nb chains at the local atomic scale, with a peculiar correlated displacement of Nb-Nb and Nb-Nb-Nb configurations. Such a local effect appears related to anomalies evidenced by X-ray diffraction in other superconductors belonging to the same A15 crystallographic structure.
Schiesaro, I., Anzellini, S., Loria, R., Torchio, R., Spina, T., Flukiger, R., et al. (2021). Anomalous behavior in the atomic structure of Nb3Sn under high pressure. CRYSTALS, 11(4), 331 [10.3390/cryst11040331].
File in questo prodotto:
File Dimensione Formato  
crystals-11-00331-v2.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: DRM non definito
Dimensione 2.93 MB
Formato Adobe PDF
2.93 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/396118
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 2
social impact