Unknown

Dataset Information

0

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 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.

SUBMITTER: Nishiyama S 

PROVIDER: S-EPMC5547157 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Preparation and characterization of a new graphite superconductor: Ca<sub>0.5</sub>Sr<sub>0.5</sub>C<sub>6</sub>.

Nishiyama Saki S   Fujita Hidenori H   Hoshi Masatoshi M   Miao Xiao X   Terao Takahiro T   Yang Xiaofan X   Miyazaki Takafumi T   Goto Hidenori H   Kagayama Tomoko T   Shimizu Katsuya K   Yamaoka Hitoshi H   Ishii Hirofumi H   Liao Yen-Fa YF   Kubozono Yoshihiro Y  

Scientific reports 20170807 1

We have produced a superconducting binary-elements intercalated graphite, Ca<sub>x</sub>Sr<sub>1-x</sub>C<sub>y</sub>, with the intercalation of Sr and Ca in highly-oriented pyrolytic graphite; the superconducting transition temperature, T <sub>c</sub>, was ~3 K. The superconducting Ca<sub>x</sub>Sr<sub>1-x</sub>C<sub>y</sub> sample was fabricated with the nominal x value of 0.8, i.e., Ca<sub>0.8</sub>Sr<sub>0.2</sub>C<sub>y</sub>. Energy dispersive X-ray (EDX) spectroscopy provided the stoichio  ...[more]

Similar Datasets

Unknown Exchange bias effect in polycrystalline Bi<sub>0.5</sub>Sr<sub>0.5</sub>Fe<sub>0.5</sub>Cr<sub>0.5</sub>O<sub>3</sub> bulk.
| S-EPMC10113268 | biostudies-literature
Unknown Compositional induced structural phase transitions in (1 - x)(K<sub>0.5</sub>Na<sub>0.5</sub>)NbO<sub>3</sub>-x(Ba<sub>0.5</sub>Sr<sub>0.5</sub>)TiO<sub>3</sub> ferroelectric solid solutions.
| S-EPMC10625606 | biostudies-literature
Unknown Evolution from a charge-ordered insulator to a high-temperature superconductor in Bi<sub>2</sub>Sr<sub>2</sub>(Ca,Dy)Cu<sub>2</sub>O<sub>8+δ</sub>.
| S-EPMC11375163 | biostudies-literature
Unknown High-Performance Limiting Current Oxygen Sensor Comprised of Highly Active La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O? Electrode.
| S-EPMC6069003 | biostudies-literature
Unknown Macroscopic phase separation of superconductivity and ferromagnetism in Sr<sub>0.5</sub>Ce<sub>0.5</sub>FBiS<sub>2-x</sub> Se <sub>x</sub> revealed by μSR.
| S-EPMC5727222 | biostudies-literature
Unknown Coexistence of superconductivity and ferromagnetism in Sr<sub>0.5</sub>Ce<sub>0.5</sub>FBiS<sub>2-x</sub>Se<sub>x</sub> (x = 0.5 and 1.0), a non-U material with T<sub>c</sub> < T<sub>FM</sub>.
| S-EPMC5124956 | biostudies-literature
Unknown Fluctuation induced conductivity and pseudogap state studies of Bi<sub>1.6</sub>Pb<sub>0.4</sub>Sr<sub>2</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>10+δ</sub> superconductor added with ZnO nanoparticles.
| S-EPMC7900248 | biostudies-literature
Unknown Pauli-limit upper critical field of high-temperature superconductor La<sub>1.84</sub>Sr<sub>0.16</sub>CuO<sub>4</sub>.
| S-EPMC6861275 | biostudies-literature
Unknown Real time in situ x-ray diffraction study of the crystalline structure modification of Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> during the post-annealing.
| S-EPMC6086881 | biostudies-literature
Unknown Evolution of two bulk-superconducting phases in Sr<sub>0.5</sub>RE<sub>0.5</sub>FBiS<sub>2</sub> (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect.
| S-EPMC7393496 | biostudies-literature