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Title:Unexpected Universality in Disordered Systems and Modeling Perpendicular Recording Media
Author(s):Liu, Yang
Doctoral Committee Chair(s):Hubler, Alfred
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Condensed Matter
Abstract:In state-of-the-art storage applications such as hard disk drives, the intrinsic switching field distribution of the media grains is one of the most crucial properties defining the recording quality. However, this piece of microscopic information is very hard to measure macroscopically, especially for the perpendicular recording media. Using the interacting random hysteron model, we have studied the reliability of the recently developed Delta H(M, DeltaM) method. We demonstrated that this method does have several advantages over comparable methods. First, it has a well-defined reliability range and it allows for self-consistency checks. Second, the presence of dipolar interactions in the range of typical recording media substantially enhances the reliability of this method. Third, it is robust even in the presence of randomness in exchange or magnetostatic coupling within the range of a typical recording media.
Issue Date:2009
Description:152 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.
Other Identifier(s):(MiAaPQ)AAI3363021
Date Available in IDEALS:2015-09-25
Date Deposited:2009

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