Fabrication and characterization of nanostructured magnetic particles for applications in data storage

Arrays of nanostructured magnetic particles ('nanomagnets') have potential applications in ultra-high-density data storage devices and dynamic magnetic memories, and are model systems for the study of magnetic phenomena at deep sub-micron length scales. We use interference lithography to pattern 200 nm-period arrays of nickel and cobalt nanomagnets. The nickel and cobalt are deposited via electroplating or evaporation/lift-off processes. Magnetometry techniques are used to characterize the bulk magnetic behavior of the arrays. Magnetic force microscopy is used to image the stray magnetic fields of individual nanomagnets as well as to measure particle switching fields. We compare our experimental results to predictions based on micromagnetic models and models of magnetostatic interactions. In particular, the influence of shape, size, inter-particle spacing and material properties on the remanence state of nanomagnets is evaluated. Finally, we examine the suitability of the fabricated nanomagnet arrays for applications in magnetic data storage.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2001

Author dc:creator

• Farhoud, Maya S. (Maya Sami)

Advisor dc:contributor.advisor

• Henry I. Smith and Caroline A. Ross.

• Electrical Engineering and Computer Science.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://theses.mit.edu:80/Dienst/UI/2.0/Describe/0018.mit.etheses%2f2000-59
• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Identifier URI

http://theses.mit.edu:80/Dienst/UI/2.0/Describe/0018.mit.etheses%2f2000-59

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/16759