超导磁屏蔽对高T_c-SQUID磁强计噪声的影响  

Effect of Superconducting Magnetic Shield on Noise of High T_c-SQUID Magnetometer

作　　者：王俊平[1,2,3] 古宏伟[4] 吴培钧 陈烈[1] 杨涛[1] 陈珂[1] 陈岚峰[4] 袁冠森[4] 

机构地区：[1]中国科学院物理研究所凝聚态物理中心国家超导实验室 [2]北京有色金属研究总院超导中心,北京100088 [3]河北工业大学应用数理系,天津300130 [4]北京有色金属研究总院超导中心

出　　处：《稀有金属》2000年第2期141-143,共3页Chinese Journal of Rare Metals

摘　　要：在SrTiO3 (STO)双晶衬底上激光沉积YBCO超导薄膜 ,并光刻成DCSQUID ,在超导屏蔽和 μ合金屏蔽桶两种情况下 ,测量了DCSQUID磁强计的噪声 ,前种情况下的噪声只是后种情况下噪声的三分之一。Superconducting YBCO thin film was prepared on SrTiO 3 bicrystal substrate by pulse laser ablation, while DC SQUID was fabricated by lithographic technology. The noises of DC SQUID magnetometer were measured with superconducting shield and with μ metal shield respectively, and the results indicated that noise with superconducting shield is one third of that with μ metal shield.

关 键 词：磁强计 超导屏蔽 噪声 YBCO 

分 类 号：TM936.1[电气工程—电力电子与电力传动]