Low-noise magnetic-flux sensors based on the extraordinary magnetoresistance effect

We report noise measurements on Au–InAs hybrid structures involving a high-mobility two-dimensional electron system. Such structures show the extraordinary magnetoresistance (EMR) effect. We find excellent noise performance at room temperature close to the Johnson noise, which is in particular important for a technical application. At 4.2 K and in a magnetic field of about 1 T the nonoptimized EMR device is found to exhibit a low magnetic fluxnoise, offering the perspective of sensor applications also in a high magnetic field and at cryogenic temperature.


Published in:
Applied Physics Letters, 84, 17, 3343
Year:
2004
Publisher:
American Institute of Physics
ISSN:
0003-6951
Laboratories:




 Record created 2015-07-08, last modified 2018-09-13


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