Title
Interaction of Domain Walls and Magnetic Nanoparticles in Giant Magnetoresistive Nanostrips for Biological Applications
Abbreviated Journal Title
IEEE Trans. Magn.
Keywords
Biosensing; domain walls; giant magnetoresistence; magnetic; nanoparticles; nanostrip; pinning site; BIOSENSORS; Engineering, Electrical & Electronic; Physics, Applied
Abstract
Head-to-head domain walls (DW) are formed and detected in U-shaped spin valve nanostrips by a Bitter Method on scanning electron microscope. We find that optimization of the washing technique is critical to proper deposition of magnetic nanoparticles (MNPs). The DW position is monitored electrically with giant magnetoresistance (GMR) similar to a potentiometer. DWs are repeatedly pinned and depinned from a site near the device center using a stage with two axis field. We first confirm the distribution of depinning events from a random sample of devices and obtain a standard deviation of 2.2 Oe. We then obtain an experimental signal of 8 Oe shift in depinning field from just 7 MNPs of 35 nm diameter.
Journal Title
Ieee Transactions on Magnetics
Volume
49
Issue/Number
7
Publication Date
1-1-2013
Document Type
Article
Language
English
First Page
3414
Last Page
3417
WOS Identifier
ISSN
0018-9464
Recommended Citation
"Interaction of Domain Walls and Magnetic Nanoparticles in Giant Magnetoresistive Nanostrips for Biological Applications" (2013). Faculty Bibliography 2010s. 4221.
https://stars.library.ucf.edu/facultybib2010/4221
Comments
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