Title :
Moving vector Preisach hysteresis model and δM curves
Author :
Ossart, Florence ; Davidson, Robert ; Charap, Stanley H.
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
The δM curves predicted by the vector Preisach model are analyzed and proved to always be negative. A mean interaction field parallel to the magnetization is added to the model so as to reproduce the positive δM curve of barium ferrite particulate media. By using this model in self consistent field computation, the typical overwrite behavior of barium ferrite has been reproduced. Calculated dc-erasure has been found to be more efficient than ac-erasure, which is consistent with experimental results
Keywords :
SCF calculations; coercive force; ferrites; magnetic hysteresis; magnetic particles; magnetic recording; remanence; soft magnetic materials; δM curves; ac-erasure; barium ferrite particulate media; dc-erasure; magnetization; mean interaction field; moving vector Preisach hysteresis model; overwrite behavior; self consistent field computation; Atmospheric modeling; Barium; Data storage systems; Demagnetization; Density functional theory; Ferrites; Magnetic hysteresis; Magnetic materials; Magnetization; Remanence;
Journal_Title :
Magnetics, IEEE Transactions on
