LOW-NOISE YBA2CU3O7-X-SRTIO3-YBA2CU3O7-X MULTILAYERS FOR IMPROVED SUPERCONDUCTING MAGNETOMETERS

被引：50

作者：

LUDWIG, F

KOELLE, D

DANTSKER, E

NEMETH, DT

MIKLICH, AH

CLARKE, J

THOMSON, RE

机构：

[1] UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA

[2] NATL INST STAND & TECHNOL, BOULDER, CO 80303 USA

来源：

APPLIED PHYSICS LETTERS | 1995年 / 66卷 / 03期

关键词：

D O I：

10.1063/1.114217

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated YBa2Cu3O7-x-SrTiO3-YBa 2Cu3O7-x (YBCO-STO-YBCO) trilayers, in which each layer is patterned photolithographically, capping the first YBCO film with an in situ STO film. Atomic force microscopy demonstrates that the capping process dramatically improves the quality of the surface of the second layer, allowing the growth of an upper YBCO film with a substantially reduced level of low-frequency flux noise. A magnetometer with a multiturn flux transformer coupled to a dc superconducting quantum interference device achieved a magnetic field noise of 74 fT Hz-1/2 at 1 Hz, improving to 31 fT Hz-1/2 at 1 kHz. © 1995 American Institute of Physics.

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页码：373 / 375

页数：3

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