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Permanent link (DOI): https://doi.org/10.7939/R3DN4044C

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Nanofabrication Methods Towards a Photonically-Based Torque Magnetometer for Measurement of Individual Single-Crystalline Yttrium-Iron-Garnet Microstructures Open Access

Descriptions

Other title
Subject/Keyword
Ferrimagnetic Garnet
Focused Ion Beam
Photonics
NEMS
Torque Magnetometer
SOI
Nanofabrication
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Compton, Shawn R
Supervisor and department
Freeman, Mark (Physics)
Examining committee member and department
McDermott, Mark (Chemistry)
Potter, David (Physics)
Davis, John (Physics)
Department
Department of Physics
Specialization

Date accepted
2012-01-30T16:28:56Z
Graduation date
2012-06
Degree
Master of Science
Degree level
Master's
Abstract
This thesis describes preparation and nanofabrication of single crystalline yttrium-iron-garnet (YIG) for the purposes of ultra-clean torque magnetometry, as well as the design, fabrication, and testing of photonic crystal-based nanoelectromechanical systems for sensing applications. A focused ion beam microscope is used to shape and manipulate epitaxially grown YIG, a section of which was milled into a disk capable of supporting a 3-D vortex-like state. This was placed onto a prefabricated silicon torsional resonator, which allowed a broad characterization of magnetic and mechanical properties. Secondly, a photonic crystal-based sensor was designed in a silicon-on-insulator architecture and simulated with finite-difference time-domain methods. The final device properties were tested photonically and backed by further simulations. Once released, the mechanical properties of the system were characterized interferometrically, then photonically, showing the advantages to photonic based transduction schemes. The final device presents a platform for photonically studying magnetism, by use as a torque magnetometer.
Language
English
DOI
doi:10.7939/R3DN4044C
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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