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46 papers
Direct fabrication of high-quality ring-shaped REBa2Cu3Oy bulk magnets by the Single-Direction Melt Growth (SDMG) method
Takanori Motoki, Mirei Semba, Jun-ichi Shimoyama
Ring-shaped REBa2Cu3Oy melt-textured bulks have been successfully grown by the Single-Direction Melt Growth (SDMG) method, which enables the direct fabrication of uniform bulks wit…
Development of homogeneous and high-performance REBCO bulks with flexibility in shapes by the single-direction melt growth (SDMG) method
Takanori Motoki, Rempei Sasada, Takuma Tomihisa +3
We have developed a single-direction melt growth method in which REBCO melt-textured bulks grow only vertically from a seed plate utilizing the difference in peritectic temperature…
Nuclear-spin evidence of insulating and antiferromagnetic state of CuO2 planes in superconducting Pr2Ba4Cu7O15-δ
S. Nishioka, S. Sasaki, S. Nakagawa +4
In contrast to the "Pr-issue" that neither PrBa2Cu3O7 (Pr123) nor PrBa2Cu4O8 (Pr124) shows superconductivity (SC), we have observed 100%-fraction of SC in an oxygen-reduced Pr2Ba4C…
Unique defect structure and advantageous vortex pinning properties in superconducting CaKFe4As4
Shigeyuki Ishida, Akira Iyo, Hiraku Ogino +10
The lossless current-carrying capacity of a superconductor is limited by its critical current density (Jc). A key to enhance Jc towards real-life applications is engineering defect…
Doping-dependent critical current properties in K, Co, and P-doped BaFe2As2 single crystals
Shigeyuki Ishida, Dongjoon Song, Hiraku Ogino +5
In order to establish the doping dependence of the critical current properties in the iron-based superconductors, the in-plane critical current density (Jc) of BaFe2As2-based super…
Pressure Effects on Superconducting Properties of the BiS2-Based Superconductor Bi2(O,F)S2
Tomoyuki Okada, Hiraku Ogino, Jun-ichi Shimoyama +5
Pressure effects on a recently discovered BiS2-based superconductor Bi2(O,F)S2 (Tc = 5.1 K) were examined via two different methods; high pressure resistivity measurement and high…