Local magnetometry at high fields and low temperatures using InAs Hall sensors

作者：E. Pugel, E. Shung, T. F. Rosenbaum, Simon P Watkins · 发表于：Applied Physics Letters · 年份：1997 · DOI：10.1063/1.120443 · 被引用次数：10 · 研究领域：Physics of Superconductivity and Magnetism、Magnetic properties of thin films、Magnetic Field Sensors Techniques

We characterize the temperature (0.3⩽T⩽300 K), magnetic field (0⩽H⩽80 kOe), and thickness (0.1, 0.5, and 2.5 μm) dependence of the Hall response of high purity InAs epilayers grown using metalorganic chemical vapor deposition. The high sensitivity, linearity, and temperature independence of the response make them attractive for local Hall probe magnetometry, and uniquely qualified for high field applications below liquid helium temperatures. As a stringent test of performance, we use a six element micron-sized array to monitor the internal field gradient during vortex avalanches at milliKelvin temperatures in a single crystal of YBa2Cu3O7−δ.