Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16158
Title: Exchange biased planar hall effect biosensor
Authors: CHUI KIAM MING
Keywords: Magnetic biosensor, planar Hall effect, magnetotransport measurements, sensitivity, exchange bias, annealing
Issue Date: 6-Jun-2007
Source: CHUI KIAM MING (2007-06-06). Exchange biased planar hall effect biosensor. ScholarBank@NUS Repository.
Abstract: The need for biosensors in todaya??s world is indispensable for its applications in clinical diagnostics and biological warfare. By employing microelectronics technology, magnetic biosensors that are extremely versatile and sensitive can be fabricated and integrated into biochips. In the search of an optimized biosensor, the planar Hall effect (PHE) sensor stands out as an extremely promising candidate. In this thesis, PHE sensors were fabricated using standard optical lithography and thin-film deposition techniques. It was discovered that exchange biased sensors are very sensitive to pseudo-magnetic beads. The sensitivity of the sensors was modified systematically by varying the thickness of the seed layer. The sensors were exceptionally sensitive to real magnetic beads too. The magnetic and transport properties of the trilayer system of the sensors were subsequently studied. Finally, a detailed investigation into the effect of annealing on the system was performed, and temperature dependent transport measurements were carried out as well.
URI: http://scholarbank.nus.edu.sg/handle/10635/16158
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
CHUI Kiam Ming - M Eng - ECE Dept - Exchange Biased Planar Hall Effect Biosensor - 2007.pdf2.63 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

276
checked on Dec 11, 2017

Download(s)

205
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.