Shao Hui , Shan Di , Pan Xifeng , Yan Guo , Wang Qingyang , Xiong Xiaomei
{"title":"镁扩散法制备pr6o11掺杂MgB2块体提高临界电流密度和磁性能","authors":"Shao Hui , Shan Di , Pan Xifeng , Yan Guo , Wang Qingyang , Xiong Xiaomei","doi":"10.1016/S1875-5372(18)30220-0","DOIUrl":null,"url":null,"abstract":"<div><p>The effects of the addition of Pr<sub>6</sub>O<sub>11</sub> nanopowder on the critical current density (<em>J</em><sub>c</sub>), irreversible field (<em>H</em><sub>irr</sub>) and upper critical field (<em>H</em><sub>c2</sub>) of the MgB<sub>2</sub> bulks prepared by a Mg-diffusion method were investigated. The results show that the Pr<sub>6</sub>O<sub>11</sub> nanopowder doping can significantly enhance the <em>J</em><sub>c</sub>, <em>H</em><sub>irr</sub> and <em>H</em><sub>c2</sub> of the MgB<sub>2</sub> bulks, but has little effect on the superconducting transition temperature (<em>T</em><sub>c</sub>). At 20 K in a self-field, the <em>J</em><sub>c</sub> value of the 1 wt% Pr<sub>6</sub>O<sub>11</sub>-doped MgB<sub>2</sub> sample is 3.61×10<sup>5</sup> A/cm<sup>2</sup>, which is nearly 5 times larger than that of the undoped sample. In addition, at 10 K, the <em>H</em><sub>c2</sub> and <em>H</em><sub>irr</sub> of the bulk increase by 1.9 and 2.6 T, respectively. The effect of Pr<sub>6</sub>O<sub>11</sub>-doping on superconductivity and flux pinning mechanism was also discussed.</p></div>","PeriodicalId":21056,"journal":{"name":"稀有金属材料与工程","volume":"47 10","pages":"Pages 2976-2979"},"PeriodicalIF":0.6000,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improved Critical Current Density and Magnetic Properties of Pr6O11-doped MgB2 Bulks Synthesized by Mg-diffusion Method\",\"authors\":\"Shao Hui , Shan Di , Pan Xifeng , Yan Guo , Wang Qingyang , Xiong Xiaomei\",\"doi\":\"10.1016/S1875-5372(18)30220-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effects of the addition of Pr<sub>6</sub>O<sub>11</sub> nanopowder on the critical current density (<em>J</em><sub>c</sub>), irreversible field (<em>H</em><sub>irr</sub>) and upper critical field (<em>H</em><sub>c2</sub>) of the MgB<sub>2</sub> bulks prepared by a Mg-diffusion method were investigated. The results show that the Pr<sub>6</sub>O<sub>11</sub> nanopowder doping can significantly enhance the <em>J</em><sub>c</sub>, <em>H</em><sub>irr</sub> and <em>H</em><sub>c2</sub> of the MgB<sub>2</sub> bulks, but has little effect on the superconducting transition temperature (<em>T</em><sub>c</sub>). At 20 K in a self-field, the <em>J</em><sub>c</sub> value of the 1 wt% Pr<sub>6</sub>O<sub>11</sub>-doped MgB<sub>2</sub> sample is 3.61×10<sup>5</sup> A/cm<sup>2</sup>, which is nearly 5 times larger than that of the undoped sample. In addition, at 10 K, the <em>H</em><sub>c2</sub> and <em>H</em><sub>irr</sub> of the bulk increase by 1.9 and 2.6 T, respectively. The effect of Pr<sub>6</sub>O<sub>11</sub>-doping on superconductivity and flux pinning mechanism was also discussed.</p></div>\",\"PeriodicalId\":21056,\"journal\":{\"name\":\"稀有金属材料与工程\",\"volume\":\"47 10\",\"pages\":\"Pages 2976-2979\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2018-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"稀有金属材料与工程\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1875537218302200\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"稀有金属材料与工程","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1875537218302200","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
研究了Pr6O11纳米粉体的加入对镁扩散法制备MgB2块体的临界电流密度(Jc)、不可逆场(Hirr)和上临界场(Hc2)的影响。结果表明，Pr6O11纳米粉末的掺杂能显著提高MgB2块体的Jc、Hirr和Hc2，但对超导转变温度(Tc)影响不大。在自场20 K时，掺1 wt% pr6o11的MgB2样品的Jc值为3.61×105 a /cm2，是未掺样品的近5倍。另外，在10 K时，体块的Hc2和Hirr分别增加1.9 T和2.6 T。讨论了掺杂pr6o11对超导性的影响和磁钉钉机理。
Improved Critical Current Density and Magnetic Properties of Pr6O11-doped MgB2 Bulks Synthesized by Mg-diffusion Method
The effects of the addition of Pr6O11 nanopowder on the critical current density (Jc), irreversible field (Hirr) and upper critical field (Hc2) of the MgB2 bulks prepared by a Mg-diffusion method were investigated. The results show that the Pr6O11 nanopowder doping can significantly enhance the Jc, Hirr and Hc2 of the MgB2 bulks, but has little effect on the superconducting transition temperature (Tc). At 20 K in a self-field, the Jc value of the 1 wt% Pr6O11-doped MgB2 sample is 3.61×105 A/cm2, which is nearly 5 times larger than that of the undoped sample. In addition, at 10 K, the Hc2 and Hirr of the bulk increase by 1.9 and 2.6 T, respectively. The effect of Pr6O11-doping on superconductivity and flux pinning mechanism was also discussed.
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