ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Superconducting single crystals of La1.85Sr0.15CuO4 have been grown at varioustemperatures without single crystal seeds by the traveling-solvent floating-zone method. In order toavoid the formation of bubbles during the crystal growth process, a flowing atmosphere of 2 atmoxygen or 1 atm air was applied in different temperature range. It was found that the crystal qualitycould be improved by raising the growth temperature in a certain range, and the orientation changedfrom (110) to (100) at higher temperature. X-ray diffraction results showed that the full-width athalf-maximum of the best as-prepared crystal was 0.086°. The crystals grown in 2 atm oxygenshowed a superconducting transition temperature (Tc) of 37.3 K, while the crystals grown in floatingair showed a Tc of about 35 K and it could be improved to 36.5 K by annealing in flowing oxygen
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1897.pdf
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