Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6
Abstract We have produced a superconducting binary-elements intercalated graphite, CaxSr1−xCy, with the intercalation of Sr and Ca in highly-oriented pyrolytic graphite; the superconducting transition temperature, T c, was ~3 K. The superconducting CaxSr1−xCy sample was fabricated with the nominal x...
| Hauptverfasser: | , , , , , , , , , , , , , |
|---|---|
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Nature Portfolio
2017-08-01
|
| Schriftenreihe: | Scientific Reports |
| Online Zugang: | https://doi.org/10.1038/s41598-017-07763-y |
| _version_ | 1830412540225519616 |
|---|---|
| author | Saki Nishiyama Hidenori Fujita Masatoshi Hoshi Xiao Miao Takahiro Terao Xiaofan Yang Takafumi Miyazaki Hidenori Goto Tomoko Kagayama Katsuya Shimizu Hitoshi Yamaoka Hirofumi Ishii Yen-Fa Liao Yoshihiro Kubozono |
| author_facet | Saki Nishiyama Hidenori Fujita Masatoshi Hoshi Xiao Miao Takahiro Terao Xiaofan Yang Takafumi Miyazaki Hidenori Goto Tomoko Kagayama Katsuya Shimizu Hitoshi Yamaoka Hirofumi Ishii Yen-Fa Liao Yoshihiro Kubozono |
| author_sort | Saki Nishiyama |
| collection | DOAJ |
| description | Abstract We have produced a superconducting binary-elements intercalated graphite, CaxSr1−xCy, with the intercalation of Sr and Ca in highly-oriented pyrolytic graphite; the superconducting transition temperature, T c, was ~3 K. The superconducting CaxSr1−xCy sample was fabricated with the nominal x value of 0.8, i.e., Ca0.8Sr0.2Cy. Energy dispersive X-ray (EDX) spectroscopy provided the stoichiometry of Ca0.5(2)Sr0.5(2)Cy for this sample, and the X-ray powder diffraction (XRD) pattern showed that Ca0.5(2)Sr0.5(2)Cy took the SrC6-type hexagonal-structure rather than CaC6-type rhombohedral-structure. Consequently, the chemical formula of CaxSr1−xCy sample could be expressed as ‘Ca0.5(2)Sr0.5(2)C6’. The XRD pattern of Ca0.5(2)Sr0.5(2)C6 was measured at 0–31 GPa, showing that the lattice shrank monotonically with increasing pressure up to 8.6 GPa, with the structural phase transition occurring above 8.6 GPa. The pressure dependence of T c was determined from the DC magnetic susceptibility and resistance up to 15 GPa, which exhibited a positive pressure dependence of T c up to 8.3 GPa, as in YbC6, SrC6, KC8, CaC6 and Ca0.6K0.4C8. The further application of pressure caused the rapid decrease of T c. In this study, the fabrication and superconducting properties of new binary-elements intercalated graphite, CaxSr1−xCy, are fully investigated, and suitable combinations of elements are suggested for binary-elements intercalated graphite. |
| first_indexed | 2024-12-20T20:09:30Z |
| format | Article |
| id | doaj.art-f6d80f7f5cda4b67b28dc6872c51f58f |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T20:09:30Z |
| publishDate | 2017-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-f6d80f7f5cda4b67b28dc6872c51f58f2022-12-21T19:27:51ZengNature PortfolioScientific Reports2045-23222017-08-017111010.1038/s41598-017-07763-yPreparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6Saki Nishiyama0Hidenori Fujita1Masatoshi Hoshi2Xiao Miao3Takahiro Terao4Xiaofan Yang5Takafumi Miyazaki6Hidenori Goto7Tomoko Kagayama8Katsuya Shimizu9Hitoshi Yamaoka10Hirofumi Ishii11Yen-Fa Liao12Yoshihiro Kubozono13Research Institute for Interdisciplinary Science, Okayama UniversityCenter for Science and Technology under Extreme Conditions, Graduate School of Engineering Science, Osaka UniversityCenter for Science and Technology under Extreme Conditions, Graduate School of Engineering Science, Osaka UniversityResearch Institute for Interdisciplinary Science, Okayama UniversityResearch Institute for Interdisciplinary Science, Okayama UniversityResearch Institute for Interdisciplinary Science, Okayama UniversityResearch Laboratory for Surface Science, Okayama UniversityResearch Institute for Interdisciplinary Science, Okayama UniversityCenter for Science and Technology under Extreme Conditions, Graduate School of Engineering Science, Osaka UniversityCenter for Science and Technology under Extreme Conditions, Graduate School of Engineering Science, Osaka UniversityRIKEN SPring-8 Center, RIKEN, 1-1-1 Kouto, SayoNational Synchrotron Radiation Research CenterNational Synchrotron Radiation Research CenterResearch Institute for Interdisciplinary Science, Okayama UniversityAbstract We have produced a superconducting binary-elements intercalated graphite, CaxSr1−xCy, with the intercalation of Sr and Ca in highly-oriented pyrolytic graphite; the superconducting transition temperature, T c, was ~3 K. The superconducting CaxSr1−xCy sample was fabricated with the nominal x value of 0.8, i.e., Ca0.8Sr0.2Cy. Energy dispersive X-ray (EDX) spectroscopy provided the stoichiometry of Ca0.5(2)Sr0.5(2)Cy for this sample, and the X-ray powder diffraction (XRD) pattern showed that Ca0.5(2)Sr0.5(2)Cy took the SrC6-type hexagonal-structure rather than CaC6-type rhombohedral-structure. Consequently, the chemical formula of CaxSr1−xCy sample could be expressed as ‘Ca0.5(2)Sr0.5(2)C6’. The XRD pattern of Ca0.5(2)Sr0.5(2)C6 was measured at 0–31 GPa, showing that the lattice shrank monotonically with increasing pressure up to 8.6 GPa, with the structural phase transition occurring above 8.6 GPa. The pressure dependence of T c was determined from the DC magnetic susceptibility and resistance up to 15 GPa, which exhibited a positive pressure dependence of T c up to 8.3 GPa, as in YbC6, SrC6, KC8, CaC6 and Ca0.6K0.4C8. The further application of pressure caused the rapid decrease of T c. In this study, the fabrication and superconducting properties of new binary-elements intercalated graphite, CaxSr1−xCy, are fully investigated, and suitable combinations of elements are suggested for binary-elements intercalated graphite.https://doi.org/10.1038/s41598-017-07763-y |
| spellingShingle | Saki Nishiyama Hidenori Fujita Masatoshi Hoshi Xiao Miao Takahiro Terao Xiaofan Yang Takafumi Miyazaki Hidenori Goto Tomoko Kagayama Katsuya Shimizu Hitoshi Yamaoka Hirofumi Ishii Yen-Fa Liao Yoshihiro Kubozono Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6 Scientific Reports |
| title | Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6 |
| title_full | Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6 |
| title_fullStr | Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6 |
| title_full_unstemmed | Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6 |
| title_short | Preparation and characterization of a new graphite superconductor: Ca0.5Sr0.5C6 |
| title_sort | preparation and characterization of a new graphite superconductor ca0 5sr0 5c6 |
| url | https://doi.org/10.1038/s41598-017-07763-y |
| work_keys_str_mv | AT sakinishiyama preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT hidenorifujita preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT masatoshihoshi preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT xiaomiao preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT takahiroterao preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT xiaofanyang preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT takafumimiyazaki preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT hidenorigoto preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT tomokokagayama preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT katsuyashimizu preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT hitoshiyamaoka preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT hirofumiishii preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT yenfaliao preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 AT yoshihirokubozono preparationandcharacterizationofanewgraphitesuperconductorca05sr05c6 |