Synthesis of CaKFe$_4$As$_4$ bulk samples with high critical current density using a spark plasma sintering technique
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866929295306260480 |
|---|---|
| author | Ishida, Shigeyuki Naik, S. Pavan Kumar Tsuchiya, Yoshinori Mawatari, Yasunori Yoshida, Yoshiyuki Iyo, Akira Eisaki, Hiroshi Kamiya, Yoshihisa Kawashima, Kenji Ogino, Hiraku |
| author_facet | Ishida, Shigeyuki Naik, S. Pavan Kumar Tsuchiya, Yoshinori Mawatari, Yasunori Yoshida, Yoshiyuki Iyo, Akira Eisaki, Hiroshi Kamiya, Yoshihisa Kawashima, Kenji Ogino, Hiraku |
| contents | A high density CaKFe$_4$As$_4$ bulk sample was successfully synthesized using a spark plasma sintering (SPS) technique. The density of the synthesized sample was 5.02 g cm$^{-3}$, corresponding to 96.2% of the theoretical density of CaKFe$_4$As$_4$. Moreover, a reasonably high Vickers hardness of 1 GPa was measured. The electrical resistivity of the SPS bulk sample was as low as approximately 600 $μΩ$ cm at 300 K, which is smaller than that of the ordinary sintered polycrystalline sample by nearly one order of magnitude, and exhibited a sharp superconducting transition, with the transition width $Δ\textit{T}_c$ less than 2 K, indicating an improved grain connectivity. The critical current density of the SPS bulk sample, as calculated from the magnetization hysteresis loops (magnetic $\textit{J}_c$), reached 18 kA cm$^{-2}$ at 4.2 K under 5 T, which is the highest among the iron-based superconductor polycrystalline samples reported thus far. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_19981 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Synthesis of CaKFe$_4$As$_4$ bulk samples with high critical current density using a spark plasma sintering technique Ishida, Shigeyuki Naik, S. Pavan Kumar Tsuchiya, Yoshinori Mawatari, Yasunori Yoshida, Yoshiyuki Iyo, Akira Eisaki, Hiroshi Kamiya, Yoshihisa Kawashima, Kenji Ogino, Hiraku Superconductivity Materials Science A high density CaKFe$_4$As$_4$ bulk sample was successfully synthesized using a spark plasma sintering (SPS) technique. The density of the synthesized sample was 5.02 g cm$^{-3}$, corresponding to 96.2% of the theoretical density of CaKFe$_4$As$_4$. Moreover, a reasonably high Vickers hardness of 1 GPa was measured. The electrical resistivity of the SPS bulk sample was as low as approximately 600 $μΩ$ cm at 300 K, which is smaller than that of the ordinary sintered polycrystalline sample by nearly one order of magnitude, and exhibited a sharp superconducting transition, with the transition width $Δ\textit{T}_c$ less than 2 K, indicating an improved grain connectivity. The critical current density of the SPS bulk sample, as calculated from the magnetization hysteresis loops (magnetic $\textit{J}_c$), reached 18 kA cm$^{-2}$ at 4.2 K under 5 T, which is the highest among the iron-based superconductor polycrystalline samples reported thus far. |
| title | Synthesis of CaKFe$_4$As$_4$ bulk samples with high critical current density using a spark plasma sintering technique |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2403.19981 |