{"title":"添加Al/AlOx的Nb结的特性","authors":"Hideyuki Sugiyama, Keiichi Kobata, Akira Fujimaki, Hisao Hayakawa","doi":"10.1016/S0964-1807(98)00048-9","DOIUrl":null,"url":null,"abstract":"<div><p>We systematically investigated the characteristics of Nb/Al/AlO<sub><em>x</em></sub>/Al/AlO<sub><em>x</em></sub>/Nb junctions having a structure in which Al/AlO<sub><em>x</em></sub> films are placed in a Nb/Al/AlO<sub><em>x</em></sub><span>/Nb trilayer junction. The junction characteristics reflect superconductivity in the second Al film due to the proximi</span><strong>ty effect. As a result, the critical current density</strong> <em>J</em><sub>c</sub><span> and the hysteresis on its current–voltage (</span><em>I</em>–<em>V</em>) curve strongly depend on the transparencies of the AlO<sub><em>x</em></sub> barriers. The hystereses of the junctions are smaller than t<strong>hose of Nb/Al/AlO</strong><sub><em>x</em></sub>/Nb junctions at the same <em>J</em><sub>c</sub>. Intrinsically overdamped junctions are also realized. The intrinsically overdamped junctions can considerably reduce an area occupied by a single gate. Furthermore, the spread of critical current <em>I</em><sub>c</sub> for the junctions, which have hystereses, connected in series, is ±1.2%. This shows that the junctions with additional Al/AlO<sub><em>x</em></sub> have uniform enough characteristics to be used in integrated circuits.</p></div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 483-489"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00048-9","citationCount":"1","resultStr":"{\"title\":\"Characteristics of Nb junctions with additional Al/AlOx\",\"authors\":\"Hideyuki Sugiyama, Keiichi Kobata, Akira Fujimaki, Hisao Hayakawa\",\"doi\":\"10.1016/S0964-1807(98)00048-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We systematically investigated the characteristics of Nb/Al/AlO<sub><em>x</em></sub>/Al/AlO<sub><em>x</em></sub>/Nb junctions having a structure in which Al/AlO<sub><em>x</em></sub> films are placed in a Nb/Al/AlO<sub><em>x</em></sub><span>/Nb trilayer junction. The junction characteristics reflect superconductivity in the second Al film due to the proximi</span><strong>ty effect. As a result, the critical current density</strong> <em>J</em><sub>c</sub><span> and the hysteresis on its current–voltage (</span><em>I</em>–<em>V</em>) curve strongly depend on the transparencies of the AlO<sub><em>x</em></sub> barriers. The hystereses of the junctions are smaller than t<strong>hose of Nb/Al/AlO</strong><sub><em>x</em></sub>/Nb junctions at the same <em>J</em><sub>c</sub>. Intrinsically overdamped junctions are also realized. The intrinsically overdamped junctions can considerably reduce an area occupied by a single gate. Furthermore, the spread of critical current <em>I</em><sub>c</sub> for the junctions, which have hystereses, connected in series, is ±1.2%. This shows that the junctions with additional Al/AlO<sub><em>x</em></sub> have uniform enough characteristics to be used in integrated circuits.</p></div>\",\"PeriodicalId\":100110,\"journal\":{\"name\":\"Applied Superconductivity\",\"volume\":\"6 10\",\"pages\":\"Pages 483-489\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00048-9\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Superconductivity\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0964180798000489\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Superconductivity","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0964180798000489","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Characteristics of Nb junctions with additional Al/AlOx
We systematically investigated the characteristics of Nb/Al/AlOx/Al/AlOx/Nb junctions having a structure in which Al/AlOx films are placed in a Nb/Al/AlOx/Nb trilayer junction. The junction characteristics reflect superconductivity in the second Al film due to the proximity effect. As a result, the critical current densityJc and the hysteresis on its current–voltage (I–V) curve strongly depend on the transparencies of the AlOx barriers. The hystereses of the junctions are smaller than those of Nb/Al/AlOx/Nb junctions at the same Jc. Intrinsically overdamped junctions are also realized. The intrinsically overdamped junctions can considerably reduce an area occupied by a single gate. Furthermore, the spread of critical current Ic for the junctions, which have hystereses, connected in series, is ±1.2%. This shows that the junctions with additional Al/AlOx have uniform enough characteristics to be used in integrated circuits.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
