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Title:Magnetotransport of connected artificial spin ice
Author(s):Le, Brian Lamson
Director of Research:Schiffer, Peter E
Doctoral Committee Chair(s):Mason, Nadya
Doctoral Committee Member(s):DeMarco, Brian L; Vishveshwara, Smitha
Department / Program:Physics
Discipline:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):artificial spin ice
frustrated magnetism
magnetotransport
exchange bias
anisotropic magnetoresistance
planar Hall effect
Abstract:Artificial spin ices are mesoscopic arrays of interacting single-domain ferromagnetic nanoislands or nanowires. With Ising-like behavior of individual magnetic moments, artificial spin ice has been utilized to investigate geometrically frustrated systems like spin ice, a class of magnetic pyrochlore oxides. Here I detail measurements of the magnetotransport response of connected artificial spin ice to varying temperatures and magnetic fields. In the literature, transport measurements have been used simply as a tool to probe the behavior of connected artificial spin ice. Here I demonstrate that connected artificial spin ice possesses fascinating intrinsic magnetotransport properties. I describe first the interplay between artificial spin ice transport and another magnetic phenomenon, exchange bias. Afterwards, I detail systematic transport measurements for different magnetic field directions, revealing that the vertices of connected artificial spin ice control facets of the transport features.
Issue Date:2016-04-11
Type:Thesis
URI:http://hdl.handle.net/2142/90524
Rights Information:Copyright 2016 by Brian L. Le
Date Available in IDEALS:2016-07-07
Date Deposited:2016-05


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