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Equisensitive adjustment of planar Hall effect sensor's operating field range by material and thickness variation of active layers

Title
Equisensitive adjustment of planar Hall effect sensor's operating field range by material and thickness variation of active layers
Authors
Aly, Amir Ibrahim ElzawawyKim, SungJoonTalantsev, ArtemKim, CheolGi
DGIST Authors
Kim, CheolGi
Issue Date
2019-07
Citation
Journal of Physics D: Applied Physics, 52(28), 285001
Type
Article
Article Type
Article
Author Keyword
planar Hall effect; operating field range; sensitivity; output voltage; shunt current; interface coupling; magnetic sensors
Keyword
ANISOTROPIC MAGNETORESISTANCE; EXCHANGE BIAS; NI81FE19; INTERFACE; FILMS
ISSN
0022-3727
Abstract
A novel technique of operating field range adjustment using varying thicknesses of spacer and capping layers is proposed for planar Hall effect (PHE) magnetic sensors. In terms of this technique, the spacer and capping layer thicknesses are varied interdependently, in a way that the variation of the operating magnetic field range is performed without a change of sensitivity. The relationship between the thicknesses of spacer and capping layers required for this 'equisensitive' variation of field range are calculated and experimentally approved. The active layer material substitution effect on the performance of PHE sensor is studied. The sensitivity, output voltage, operating field range, and shunt current are compared for PHE sensors, based on NiFe and NiFeMo active ferromagnetic layers. The NiFe/IrMn and NiFeMo/IrMn interface coupling energies are compared and the effect of IrMn crystallinity on their difference is discussed. The range of active layer thicknesses, at which the operating field range can be varied while maintaining the sensitivity at the same value, has been determined. © 2019 IOP Publishing Ltd.
URI
http://hdl.handle.net/20.500.11750/9863
DOI
10.1088/1361-6463/ab18f2
Publisher
Institute of Physics Publishing
Related Researcher
  • Author Kim, CheolGi Lab for NanoBio-MatErials & SpinTronics(nBEST)
  • Research Interests Magnetic Materials and Spintronics; Converging Technology of Nanomaterials and Biomaterials; Bio-NEMS;MEMS
Files:
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Collection:
Department of Emerging Materials ScienceLab for NanoBio-Materials & SpinTronics(nBEST)1. Journal Articles


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