Study of (La1-xMx)2CuO4+δ annealed in high pressure oxygen gas

✍ Scribed by Yasukage Oda; Masaru Yamada; Kunisuke Asayama; Takao Kohara; Yoshihiro Yamada

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 383 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80417-1

✦ Synopsis

The relation between the superconducting transition temperature and the dopant concentration, x, in (La 1 M) Cu0 4 (M=Sr and Cal annealed in high pressure oxygen gas up to 400 bar is studied in detalI~xT5e sutgrconducting phase in La 2 Cu0 4 +. is found to become unstable by doping. The measurement of the Hall effect in the undoped sa~ple shows that the hole-like carriers increase with the oxygen pressure of annealing, while those in the doped sample are little changed.