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Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure

Dipartimento di Scienze, Università Roma Tre, Via della Vasca Navale 79, 00146 Rome, Italy
Diamond Light Source Ltd., Harwell Science & Innovation Campus, Diamond House, Didcot OX11 0DE, UK
ESRF—European Synchrotron Radiation Facility, 38000 Grenoble, France
Superconducting Radio Frequency (SRF) Materials and Research Department, Fermilab, Batavia, IL 60510, USA
Department of Quantum Matter Physics, University of Geneva, 1211 Geneva, Switzerland
Geodynamics Research Center, 6 Ehime University, Matsuyama 790-8577, Japan
Dipartimento di Ingegneria, Università Roma Tre, 00146 Roma, Italy
Author to whom correspondence should be addressed.
Academic Editor: Sergio Brutti
Crystals 2021, 11(4), 331;
Received: 18 February 2021 / Revised: 18 March 2021 / Accepted: 21 March 2021 / Published: 25 March 2021
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. View Full-Text
Keywords: Nb3Sn; local atomic structure; high pressure; XAFS Nb3Sn; local atomic structure; high pressure; XAFS
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MDPI and ACS Style

Schiesaro, I.; Anzellini, S.; Loria, R.; Torchio, R.; Spina, T.; Flükiger, R.; Irifune, T.; Silva, E.; Meneghini, C. Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure. Crystals 2021, 11, 331.

AMA Style

Schiesaro I, Anzellini S, Loria R, Torchio R, Spina T, Flükiger R, Irifune T, Silva E, Meneghini C. Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure. Crystals. 2021; 11(4):331.

Chicago/Turabian Style

Schiesaro, Irene, Simone Anzellini, Rita Loria, Raffaella Torchio, Tiziana Spina, René Flükiger, Tetsuo Irifune, Enrico Silva, and Carlo Meneghini. 2021. "Anomalous Behavior in the Atomic Structure of Nb3Sn under High Pressure" Crystals 11, no. 4: 331.

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