Step Induced Magnetic Anisotropy of Fe/W(100)

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" Step Induced Magnetic Anisotropy of Fe/W(100) "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	151691
Doc. No	:	ET23483
Main Entry	:	James Erskine
Title Proper	:	Step Induced Magnetic Anisotropy of Fe/W(100)
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	Surface Magneto Optic Kerr Effect (SMOKE) measurements of ultrat hin layers ofFe on graded-stepdensity W(001) are used to test essential predictions of a hystere-sis loop phase diagram model reported by Zangwill e t d . [I]. The oncdimensionalmicromagetic model produces a rich variety of hysteresis loop shapes as well as pre-dictions of switching field strengths that depend on two parameters: A = normalizedstep length and r; = normalized stepanisotropy energy. These parameters are var-ied in the experiment by using a graded-stepdensity W(001) surface (vicinal anglea range from 0' - 15), and by reducing the step anisotropy energv with chernisorption. Spot-Profile-Analysis Low Energy Electron Dirraction (SPA-LEED) is usedto characterize the stepped surfaces.The experiments indicate that the Zangwill model succwsfully accounts forgeneral trends in hysteresis loop shapes and switching field dependencies as a func-tion of A and r;. Our measured switching fields, (Hswirch) vs vicinality for 2 monolay-ers thick Fe films are generally compatible with results reported by Kawakami et-al. [2]over the range 0' < o < 7, although our results over this range yield a power law......-....,....-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL46724.pdf
Title and statement of responsibility and	:	Step Induced Magnetic Anisotropy of Fe/W(100) [Thesis]