高温超导台阶结YBCO dc-SQUID一阶平面梯度计  

YBCO STEP-EDGE JUNCTION DC-SQUID PLANAR GRADIOMETER

作　　者：韩冰[1] 陈赓华[1] 徐凤枝[1] 赵士平[1] 杨乾声[1] 

机构地区：[1]中国科学院物理研究所,凝聚态物理中心,北京100080

出　　处：《物理学报》2000年第10期2051-2054,共4页Acta Physica Sinica

摘　　要：在 10mm× 10mmSrTiO3 (STO)台阶衬底上用单层YBa2 Cu3 O7-δ(YBCO)薄膜制备了dc SQUID一阶平面梯度计 ,探测环面积约为 33mm2 ,基线长度d =4 5mm .该梯度计在无屏蔽条件下对地磁场有较好的屏蔽作用 ,共模抑制比为 1 4× 10 2 ,磁场梯度灵敏度为 8PT/cmHz(白噪声区 ) .A dc\|SQUID planar gradiometer has been fabricated with YBa\-2Cu\-3O\-\{7-δ\} step\|edge Josephson junctions on a 10?mm×10?mm single crystal SrTiO\-3 [100] substrate. The gradiometer has a pair of pickup loops with an area of 33 mm\+2 and the baseline of 4 5?mm. The system operates well in unshielded environment. A rejection of common mode fields of 1 4×10 2 in all directions and a field gradient sensitivity (white noise) better than 8?pT/cmHz at 77?K have been achieved.

关 键 词：台阶结 SQUID 平面梯度计 高温超导 YBCO 

分 类 号：O511.2[理学—低温物理]