Original synthesis route of bulk binary superconducting graphite intercalation compounds with strontium, barium and ytterbium

Thanks to its lamellar structure, graphite can host various chemical species between its interplanar spaces to form Graphite Intercalation Compounds (GIC). Intercalation of metals into graphite can lead to remarkable modifications of the physical properties of the sample with respect to pristine gra...

Full description

Saved in:
Bibliographic Details
Published in:New journal of chemistry 2020-06, Vol.44 (24), p.15-155
Main Authors: Cahen, S, El-Hajj, I, Speyer, L, Berger, P, Medjahdi, G, Lagrange, P, Lamura, G, Hérold, C
Format: Article
Language:English
Subjects:
Barium
Chemical composition
Chemical Sciences
Graphite
Intercalation
Intercalation compounds
Lamellar structure
Lithium chloride
Material chemistry
Molten salts
Physical properties
Strontium compounds
Superconductivity
Ytterbium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Thanks to its lamellar structure, graphite can host various chemical species between its interplanar spaces to form Graphite Intercalation Compounds (GIC). Intercalation of metals into graphite can lead to remarkable modifications of the physical properties of the sample with respect to pristine graphite as for instance superconductivity. In this paper, we report attempts made to intercalate strontium, barium and ytterbium into graphite, using a recent method involving a LiCl-KCl molten salt as a reaction medium. Resulting samples are characterized regarding their structure and chemical composition. We reveal the obtaining of bulk SrC 6 and BaC 6 and a superficial intercalation of ytterbium leading to superconducting YbC 6 domains only, as confirmed by dc-magnetization measurements. The synthesis route in molten salts allows the bulk intercalation into graphite of elements hardly intercalated by themselves. XRD and ion beam analyses show for instance the possible synthesis of SrC 6 .
ISSN:1144-0546
1369-9261
DOI:10.1039/c9nj06423k