The property improvement of bulk high-temperature superconductors by plasma treatment

✍ Scribed by A.G. Ulyashin; Z.Q. Yang; N.V. Shlopak; Y.A. Bumay; V.A. Esepkin; A.V. Alifanov; A.V. Stepanenko

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 117 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)91427-3

✦ Synopsis

An influence of atomic oxygen exposure on the superconductivity of YBa2Cu307_ x , Bi2Sr2Ca2Cu3010 + y and Bi2Sr2CalCU20 8 +z ceramics has been examined by the critical current density Jc, critical temperature T c and X-ray diffraction measurements. It is shown that exposure of high-T c superconductors to a low power density oxygen plasma at 473 K and 673 K leads to an increase of both T c and Jc" The improvement of superconductivity can be explained by the passivation of dangling bonds and defects on grain boundaries of these materials.