Enhanced magnetic irreversibility characteristics by expansion of blocking block for Sr2Ca2Cu3O8-δ high-Tc superconductor

Research output: Contribution to journalArticle


  • Tomoya Aoba
  • Tsuneo Suzuki
  • Tadachika Nakayama
  • Hisayuki Suematsu
  • Koichi Niihara
  • Maarit Karppinen

Research units

  • Nagaoka University of Technology
  • Toyohashi University of Technology


We demonstrate that the irreversibility field characteristics of high-Tc superconductors are not necessarily enhanced by decreasing the thickness of the non-superconducting blocking block between adjacent superconducting blocks. The experimental data are for the high-pressure-synthesized Sr2Ca2Cu3O8%δ (0(Sr)223; Tc = 105 K) phase and for its water-containing derivative phase (H2O)m/2Sr2Ca2Cu3O8%δ (H-m(Sr)223; Tc = 105 K), which spontaneously forms when the 0(Sr)223 phase is exposed to air at 80 °C. Our results clearly show that the insertion of water into the 0(Sr)223 phase expands the blocking block by 3.1A along the c-axis but improves the Jc and Hirr properties while keeping the high Tc intact.


Original languageEnglish
Article number083101
JournalJapanese Journal of Applied Physics
Issue number8
Publication statusPublished - 1 Aug 2017
MoE publication typeA1 Journal article-refereed

ID: 14665515