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Hall effect enhanced low-field sensitivity in a three-contact extraordinary magnetoresistance sensor

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2 Author(s)
Jian Sun ; Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia ; Kosel, J.

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An extraordinary magnetoresistance (EMR) device with a 3-contact geometry has been fabricated and characterized. A large enhancement of the output sensitivity at low magnetic fields compared to the conventional EMR device has been found, which can be attributed to an additional influence coming from the Hall effect. Output sensitivities of 0.19 mV/T at zero-field and 0.2 mV/T at 0.01 T have been measured in the device, which is equivalent to the ones of the conventional EMR sensors with a bias of ∼0.04 T. The exceptional performance of EMR sensors in the high field region is maintained in the 3-contact device.

Published in:

Applied Physics Letters  (Volume:100 ,  Issue: 23 )

Date of Publication:

Jun 2012

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