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oai:www.ideals.illinois.edu:2142/80600 2023-07-11 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

Hubler, Alfred Liu, Yang 2015-09-25T20:03:15Z 2015-09-25T20:03:15Z 10000-01-01 2009 2009 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. Made available in DSpace on 2015-09-25T20:03:15Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3363021.pdf: 6815910 bytes, checksum: 37dc5f772f5d07d342af37f3e60fd465 (MD5) Previous issue date: 2009 Embargo set by: Seth Robbins for item 81882 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 152 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009. http://hdl.handle.net/2142/80600 (MiAaPQ)AAI3363021 eng Physics, Condensed Matter Unexpected Universality in Disordered Systems and Modeling Perpendicular Recording Media text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.