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Since the discovery of high T_c super-conductor, much effort was made toits application. More and more evidencehas revealed that most promising fieldof high T_c superconductor first to havesuccess must be the microelectronics andcomputer. Superconductor films for mi-croelectronic application are preparedby PVD method, such as electron beamevaporation, pulsed laser evaporation andmagnetron sputtering. In this paper, thepreliminary results of ion beam sputteringdeposition of YBaCuO film are reported 相似文献
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The resistivity and magnetic susceptibility ofthe quenched samples for the Y-Ba-Cu oxideswere measured at room temperature.Themeasurement for the temperature dependence of theamorphous Bi-Sr-Ca-Cu oxides with differentheat treatment temperature was made.Theresistivity and the parameters C in the formulax=X_0+C/(T-0)of the quenched samples forY-Ba-Cu oxides decreased with lowering quenchtemperature,and their susceptibility did not varymonotonously with quench temperature.The tem-perature dependence of the amorphousBi-Sr-Ca-Cu oxides gradually deviates fromCurie-Weiss law with increasing heat treatmenttemperature.The local magnetic moments forY-Ba-Cu and amorphous Bi-Sr-Ca-Cu oxidesgradually decrease with decreasing quench tempera-ture or increasing heat treatment temperature. 相似文献
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采用喷雾干燥法制备了4种不同Ca含量的BSCCO 2223初始粉末,并研究了Ca掺杂对Bi-2223银包套超导带材的相转化、微观结构和电流传输性能的影响.实验表明,增加Ca含量促进了2223相的转化和提高了带材的临界电流,但同时也在超导芯中引入了较多的富Ca的非超导杂相.分析认为,较高的Ca含量增加了体系烧结过程中液相的含量,进而促进了相转化和晶粒生长及晶间连接,因而改善了电流传输能力。 相似文献