Abstract
We have developed a highly sensitive local magnetic sensor by using a ballistic transport property in a two-dimensional conductor. A semiclassical simulation reveals that the sensitivity increases when the geometry of the sensor and the spatial distribution of the local field are optimized. We have also experimentally demonstrated a clear observation of a magnetization process in a permalloy dot whose size is much smaller than the size of an optimized ballistic magnetic sensor fabricated from a GaAs/AlGaAs two-dimensional electron gas.
Original language | English |
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Article number | 142408 |
Journal | Applied Physics Letters |
Volume | 104 |
Issue number | 14 |
DOIs | |
Publication status | Published - Apr 7 2014 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)