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    • 4. 发明申请
    • Apparatus for detecting magnetic signals and signals of electric tunneling
    • 用于检测电磁隧道的磁信号和信号的装置
    • US20070268016A1
    • 2007-11-22
    • US11434107
    • 2006-05-16
    • Cheng-Chung ChiYang-Chung LiaoMing-Jye Wang
    • Cheng-Chung ChiYang-Chung LiaoMing-Jye Wang
    • G01R33/02
    • G01R33/02G01Q60/02G01Q60/16G01Q60/54G01R33/0354G01R33/10
    • A scanning probe microscope comprises a magnetic sensor and a sensor of electric tunneling current. The miscroscope integrates both the advantages of scanning SQUID microscope (SSM), and scanning tunneling microscope (STM), into a single instrument by applying a high-permeability metallic tip such as a permalloy tip, a pick-up coil and a transformer coupling the tip and the SQUID chip together. The local magnetic field of the test sample induces a substantial magnetization in the probing tip of high permeability. Through the pick-up coil inductively coupled to the tip, the magnetic signal of the induced moment is transferred to the SQUID chip via the transformer to achieve the best flux transferring condition. The metallic tip has the capability of sensing tunneling current and thus this instrument can also retain the capabilities of the STM, such as topography, current images and mappings of local density of state. This microscope can be used to observe both the magnetic signal and the electric tunneling signal simultaneously and can manipulate the tip by using either the magnetic signal or the electric tunneling signal as the feedback control.
    • 扫描探针显微镜包括磁传感器和电穿隧电流传感器。 该扫描仪将扫描SQUID显微镜(SSM)和扫描隧道显微镜(STM)的优点集成到单个仪器中,通过应用高磁导率金属尖端,例如坡莫合金尖端,拾取线圈和变压器耦合 尖端和SQUID芯片在一起。 测试样品的局部磁场在高磁导率的探测尖端中引起大量的磁化。 通过感应耦合到尖端的拾波线圈,感应力矩的磁信号通过变压器传递到SQUID芯片,以实现最佳的磁通转移条件。 金属尖端具有感测隧道电流的能力,因此该仪器还可以保留STM的能力,例如地形,当前图像和局部状态密度的映射。 该显微镜可用于同时观察磁信号和电通道信号,并可以使用磁信号或电通道信号作为反馈控制来操纵尖端。