YBA2CU3O7 THIN-FILM SQUID GRADIOMETER FOR BIOMAGNETIC MEASUREMENTS

被引：61

作者：

TAVRIN, Y ^{[1
]}

ZHANG, Y ^{[1
]}

MUCK, M ^{[1
]}

BRAGINSKI, AI ^{[1
]}

HEIDEN, C ^{[1
]}

机构：

[1] UKRAINIAN ACAD SCI, INST LOW TEMP PHYS & ENGN, KHARKOV, UKRAINE

来源：

APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 15期

关键词：

D O I：

10.1063/1.109561

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Low-noise rf SQUID washers fabricated from YBa2Cu3O7 epitaxial thin films have been used to construct a first-order electronic gradiometer operating at 77 K and suitable for biomagnetic measurements. Mechanical adjustment of the two-SQUID gradiometric setup made it possible to attenuate signals due to far magnetic field sources by three orders of magnitude. A magnetic field resolution of less-than-or-equal-to 280 fT/Hz1/2 above 2 Hz was attained through the use of large flux focusers. The fine structure of human heart magnetocardiograms was recorded in unshielded space. In a shielded room, magnetoencephalograms were obtained. The system was used to obtain new data on auditory evoked cortical response.

引用

页码：1824 / 1826

页数：3

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