ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
Different high-Tc superconducting Y-Ba-Cu-O samples of slabs and rings have beeninvestigated. Using differently prepared Y1Ba2Cu3O7-d materials, significant deviations betweenirradiated and unirradiated specimens have been detected in their properties. These investigationsdemonstrate that unlikely prepared superconductors are differently sensitive to the externalirradiation, although they have the same composition. The irradiation applied during theseexperiments consisted of high-energy Bi-ions with the flux of 5x1010 ions/cm2 and with the energyof 720 MeV. As is experienced, a considerable variation of the magnetic moment in the extent of19-44% and a significant increase of the critical current density up to 41% can be detected. Theseoriginate from the change of the properties of materials due to the irradiation. For the evaluation ofthe experiments a new fitting method is elaborated for the temperature dependence of the criticalcurrent density, providing fully correct results for the whole temperature interval. The A.C.magnetic measurements show, that the irradiation causes to reach the state of the perfectdiamagnetism at higher temperatures, than in the case of unirradiated samples. Similarly, theirradiated specimens have much lower losses, than the unirradiated ones and even these smallervalues disappear at low temperatures
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.47.63.pdf
