{"title":"Gd-Ba-Cu-O类大型散装超导材料的捕捉磁场、磁悬浮力对温度的依赖性","authors":"紳也 成木, 正敬 藤倉, 直道 坂井, 泉 平林, 雅人 村上","doi":"10.2221/JCSJ.40.292","DOIUrl":null,"url":null,"abstract":"We investigated the temperature dependence of the trapped magnetic field and levitation force for c-axis-oriented single-grain Gd-Ba-Cu-O bulk superconductors 48 mm in diameter. The trapped magnetic fields of the samples were 2.1-2.2 T at 77 K and increased with decreasing temperature, reaching 4.1 T at 70 K. However, the samples fractured during the measurements at lower temperatures due to a large electromagnetic force. Reinforcement using a metal ring was effective in improving the mechanical strength. The sample encapsulated in an Al ring could trap a very high magnetic field of 9.0 T at 50 K. In liquid O2(90.2 K), the Gd-Ba-Cu-O bulk superconductor exhibited a trapped magnetic field of 0.4 T and a levitation force about half the value of that in liquid N2.","PeriodicalId":285677,"journal":{"name":"Teion Kogaku (journal of The Cryogenic Society of Japan)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Gd-Ba-Cu-O系大型バルク超電導材料の捕捉磁場，磁気浮上力の温度依存性\",\"authors\":\"紳也 成木, 正敬 藤倉, 直道 坂井, 泉 平林, 雅人 村上\",\"doi\":\"10.2221/JCSJ.40.292\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We investigated the temperature dependence of the trapped magnetic field and levitation force for c-axis-oriented single-grain Gd-Ba-Cu-O bulk superconductors 48 mm in diameter. The trapped magnetic fields of the samples were 2.1-2.2 T at 77 K and increased with decreasing temperature, reaching 4.1 T at 70 K. However, the samples fractured during the measurements at lower temperatures due to a large electromagnetic force. Reinforcement using a metal ring was effective in improving the mechanical strength. The sample encapsulated in an Al ring could trap a very high magnetic field of 9.0 T at 50 K. In liquid O2(90.2 K), the Gd-Ba-Cu-O bulk superconductor exhibited a trapped magnetic field of 0.4 T and a levitation force about half the value of that in liquid N2.\",\"PeriodicalId\":285677,\"journal\":{\"name\":\"Teion Kogaku (journal of The Cryogenic Society of Japan)\",\"volume\":\"35 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2005-07-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Teion Kogaku (journal of The Cryogenic Society of Japan)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2221/JCSJ.40.292\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Teion Kogaku (journal of The Cryogenic Society of Japan)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2221/JCSJ.40.292","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
We investigated the temperature dependence of the trapped magnetic field and levitation force for c-axis-oriented single-grain Gd-Ba-Cu-O bulk superconductors 48 mm in diameter. The trapped magnetic fields of the samples were 2.1-2.2 T at 77 K and increased with decreasing temperature, reaching 4.1 T at 70 K. However, the samples fractured during the measurements at lower temperatures due to a large electromagnetic force. Reinforcement using a metal ring was effective in improving the mechanical strength. The sample encapsulated in an Al ring could trap a very high magnetic field of 9.0 T at 50 K. In liquid O2(90.2 K), the Gd-Ba-Cu-O bulk superconductor exhibited a trapped magnetic field of 0.4 T and a levitation force about half the value of that in liquid N2.
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