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Hybrid squid microscope with magnetic flux-guide for high resolution magnetic and current imaging by direct magnetic field sensing
Hybrid squid microscope with magnetic flux-guide for high resolution magnetic and current imaging by direct magnetic field sensing
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机译:带磁通量引导器的混合鱿鱼显微镜,通过直接磁场感应实现高分辨率的磁和电流成像
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摘要
A scanning microscope for high resolution current imaging by direct magnetic field sensing of a sample maintained in an ambient environment. The scanning microscope uses a magnetic sensor such as a SQUID and a fiber probe magnetically coupled between the SQUID sensor and the sample under study. The fiber probe has a sharply defined tip for high resolution probing and for reaching minute cavities on the surface of the sample. The coupling between the tip of the fiber probe and the sample is controlled by a distance control mechanism, in the range of 1-100 nm. The material of the fiber probe with high permeability and low magnetic noise is chosen to optimize flux transmission to the magnetic sensor. Magnetic coupling to the sensor is maximized by keeping the distance between the end of the fiber probe and the sensor to approximately 0-100 μm. The fiber probe is integrated into the fiber holder for easy replacement of the fiber probe.
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