Irreversibility lines of HgBa2CuO4+δ with different oxygen contents

✍ Scribed by R. Usami; H. Kubota; R. Puzniak; C.-J. Liu; H. Yamauchi

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 202 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)92600-x

✦ Synopsis

Single phase HgBa2CuO,~ samples were annealed in flowing oxygen gas or m flowing argon gas. Oxygen contents of both samples determined by iodometric titrations indicate that the samples annealed in oxygen gas and in argon gas were respectively in over-doped and in under-doped region. Both samples were respectively grain-aligned in magnetic fields. Hysteresis loops for grain-aligned over-doped and under-doped samples were measured in applied fields parallel and perpendicular to the c-axis. Region where irreversibility lines of over-doped sample was located was found to be higher than that of under-doped sample. Irreversibility line of over-doped sample was found to be higher than that of YBa2Cu306. 6. Anisotropy of irreversibility lines of both samples were found to be smaller than that of Y-123 superconductors.