Magnetic microscopy using a liquid nitrogen cooled YBa2Cu3O7 superconducting quantum interference device
Magnetic microscopy using a liquid nitrogen cooled YBa2Cu3O7 superconducting quantum interference device
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使用液氮冷却YBa2Cu3O7超导量子干涉装置的磁显微镜
DOI：
10.1063/1.109448
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发表时间：
1993
影响因子：
4
通讯作者：
J. Clarke
中科院分区：
文献类型：
--
作者：
R. Black;A. Mathai;F. Wellstood;E. Dantsker;A. Miklich;D. T. Nemeth;J. J. Kingston;J. Clarke
我们开发了一种磁通量显微镜，它使用液氮冷却薄膜YBa2Cu3O7直流超导量子干涉器件（SQUID）来产生磁场的二维图像。该仪器作为扫描探针显微镜工作，空间分辨率约为80 μm，视野约为100 mm2。SQUID的等效磁场噪声范围从80pt Hz−1/2 （1hz）到20pt Hz−1/2 (1khz)，在我们的图像中产生约200pt的场分辨率。我们已经使用显微镜成像铁磁样品中的磁畴，细导线中的小电流，超导薄膜中的捕获通量和抗磁化率。
We have developed a magnetic flux microscope which uses a liquid nitrogen cooled thin‐film YBa2Cu3O7 dc superconducting quantum interference device (SQUID) to produce two‐dimensional images of magnetic fields. The instrument operates as a scanning probe microscope with a spatial resolution of about 80 μm and a field of view of about 100 mm2. The equivalent magnetic field noise in the SQUID ranges from 80 pT Hz−1/2 at 1 Hz to 20 pT Hz−1/2 at 1 kHz, yielding a field resolution of about 200 pT in our images. We have used the microscope to image magnetic domains in ferromagnetic samples, small currents flowing in fine wires, and trapped flux and diamagnetic susceptibility in superconducting thin films.