The orthorhombic unit cell of high Tc oxide superconductor YBa2Cu3O7–x is indicated by two-dimensional CuO2 planes spanned in a-b directions. Partial removal of oxygen, down to x > 1, creates an insulating state and randomly distributed oxygen vacancies. An attempt has been made to increase the concentration of vacancies up to some critical value when their ordering could take place, while balance with copper cations will still maintain the original tetragonal structure. Removal of two oxygen atoms per unit cell results in the YBa2Cu3O5 compound and formation of linear Cu1+– O chains. The novel phase is an insulator, and doping in a low (50 –200 mbar) oxygen atmosphere at T < 800 K converts it to a conducting state.
高锝氧化物超导体 YBa2Cu3O7-x 的正方晶胞由横跨 a-b 方向的二维 CuO2 平面表示。部分脱氧（x > 1）会产生绝缘状态和随机分布的氧空位。我们试图将空位的浓度提高到某个临界值，使其发生有序化，而铜阳离子的平衡仍能保持原有的四方结构。每个单元格去掉两个氧原子后，就形成了 YBa2Cu3O5 化合物和线性 Cu1+- O 链。这种新型相是一种绝缘体，在温度小于 800 K 的低氧（50 -200 毫巴）环境中掺杂可将其转化为导电状态。
{"title":"Novel Phase YBa2Cu3O5 derived from the High Tc Superconductor YBa2Cu3O7-x","authors":"Djurek Danijel","doi":"10.17352/acms.000003","DOIUrl":"https://doi.org/10.17352/acms.000003","url":null,"abstract":"The orthorhombic unit cell of high Tc oxide superconductor YBa2Cu3O7–x is indicated by two-dimensional CuO2 planes spanned in a-b directions. Partial removal of oxygen, down to x > 1, creates an insulating state and randomly distributed oxygen vacancies. An attempt has been made to increase the concentration of vacancies up to some critical value when their ordering could take place, while balance with copper cations will still maintain the original tetragonal structure. Removal of two oxygen atoms per unit cell results in the YBa2Cu3O5 compound and formation of linear Cu1+– O chains. The novel phase is an insulator, and doping in a low (50 –200 mbar) oxygen atmosphere at T < 800 K converts it to a conducting state.","PeriodicalId":511478,"journal":{"name":"Applied Chemistry and Materials Science","volume":"41 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140261674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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