High-pressure syntheses of Ga/Al-based cuprate superconductors
作者： Masaaki Isobe , Kousuke Kosuda , Yoshio Matsui , Eiji Takayama-Muromachi
DOI: 10.1007/978-4-431-68535-7_61
关键词: Cuprate 、 High pressure 、 High-resolution transmission electron microscopy 、 Superconducting volume fraction 、 Homologous series 、 Crystallography 、 Structural phase 、 Phase (matter) 、 Materials science 、 Superconductivity
摘要: A new superconducting phase was found in the samples with nominal compositions of AlSr2(Y1−xCax)Cu2O7(xz0.2) prepared at high-pressure 5 GPa. This belongs to a homologous series AlSr2Can−1CunO2n+3 (A1-12(n−1)n) recently discovered by our group. The highest Tc 89 K, though volume fraction still small, 5.8% K for sample x=0.8. HRTEM observation revealed that Al-1223 type structural exists sample.
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