Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/16889
Title: Magnetotransport and magnetooptical properties of ferromagnetic nanostructures
Authors: JAIN SHIKHA
Keywords: ferromagnetic nanostructures, magnetic rings, exchange bias, magnetostatic coupling, synchronous measurement, individual rings
Issue Date: 14-Sep-2009
Citation: JAIN SHIKHA (2009-09-14). Magnetotransport and magnetooptical properties of ferromagnetic nanostructures. ScholarBank@NUS Repository.
Abstract: Ferromagnetic (FM) nanostructures have attracted great research interest in recent years due to their potential applications in magnetic random access memories (MRAM) and logic devices. With the use of advanced lithography techniques and nano-characterization tools, this thesis attempts to enhance the current fundamental understanding in magnetic nanostructures. In the first part of the thesis, a systematic control of vortex chirality in FM nanodots using in-plane magnetic field and lattice dot configurations is presented. A theoretical model has also been developed to investigate the magnetostatic interactions between the patterned nanodots which primarily govern the chirality of the vortex states. Second part of the thesis presents the formulation of a resistor network model to study the magnetization reversal process in individual FM ring elements. A novel non-local probing technique has also been developed to investigate the reversal behaviour in the entire ring structure, without being dependent on the contact geometry. This technique has been further utilized to control the vortex state stability in individual elliptical rings by engineering the position and orientation of magnetostatically coupled magnetic elements. Lastly, an extensive study of the effect of domain wall pinning on the vortex formation in triangular rings for both FM and antiferromagnetic (AFM) multilayer structures is presented as they are the potential candidates for magnetic logic devices.
URI: http://scholarbank.nus.edu.sg/handle/10635/16889
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
JainS.pdf9.14 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

314
checked on Apr 11, 2019

Download(s)

255
checked on Apr 11, 2019

Google ScholarTM

Check


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