【摘要】 对不同粒径超导块材的双孔ＲＦ－ＳＱＵＩＤ的噪声水平研究表明，ＹＢＣＯ超导块材的晶粒粒径与双孔ＲＦ－ＳＱＵＩＤ的噪声大小呈Ｕ形关系．在１５～２５μｍ时，噪声水平很低，小于２．０×１０－３φ０／Ｈｚ；反之，噪声水平偏高．更多还原

【Abstract】 This paper deals with the connection between the two holes RF-SQUID’s noise level and the YBCO superconductor bulk’s average diamter. The result is characterized by the U curve. The noise level is less than 2. 0 X 10-3t’Φ0/Hz when the average diameter of the bulk is 15～25 μm, otherwise it creases.更多还原