Magnetization Reversal Mechanism of Co-Cr Perpendicular Magnetic Recording Media
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In this paper, the angular dependence of the hysteresis loss was investigated in Co-Cr perpendicular recording media, and it was shown that rotational magnetization reversal occurs in the initial growth layer and the columnar structure layer in CoCr sputtered film.Abstract:
In order to investigate the mechanism of magnetization reversal in Co-Cr perpendicular recording media, the angular dependence of the hysteresis loss was investigated. For a double-layer medium consisting of a Co-Cr layer and a Permalloy backing layer, it is easy to show that rotational magnetization reversal occurs in the Co-Cr layer. Judging from both the angular dependences of H c and of the hysteresis loss, the initial growth layer and the columnar structure layer in Co-Cr sputtered film were found to undergo magnetization reversal by domain wall motion and by rotation, respectively. Other Co-Cr films with different M s and H c values were also studied with respect to the prevailing mechanism of magnetization reversal.read more
Citations
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Recent subjects and progresses in research on Co-Cr perpendicular magnetic recording media
Kazuhiro Ouchi,Shun-ichi Iwasaki +1 more
TL;DR: The Co-Cr medium, if it has a fine columnar structure, shows very high recording resolution, since the columns are predicted to show a rotational mode of magnetization reversal, and also offer an ideal perpendicular magnetization mode as mentioned in this paper.
Journal ArticleDOI
Magnetization models of Co-Cr film for the computer simulation of perpendicular magnetic recording process
TL;DR: In this article, the microscopic magnetization model of medium and the statistical calculation of the vectorial magnetization are proposed in order to give a reliable computer simulation of magnetic recording process.
Journal ArticleDOI
Studies of magnetization reversal mechanism of perpendicular recording media by hysteresis loss measurement
Kazuhiro Ouchi,S. Iwasaki +1 more
TL;DR: In this paper, the authors investigated the magnetic reversal mechanism of Co-Cr Perpendicular recording media by means of hysteresis loss as a judging criterion, and concluded that almost hystresis angular dependences of the Co Cr films can be explained by curling reversal mode, and the volume of in-plane easy axis component could be estimated quantitatively for the films with various saturation moment, coercive force and thickness.
Journal ArticleDOI
Magnetization model of perpendicular magnetic recording media for computer simulation.
TL;DR: In this paper, the vectorial magnetization process of a crystalline particle in a Co-Cr sputtered film was investigated using a magnetization reversal model and a statistical method.
Journal ArticleDOI
Perpendicular recording characteristics and microstructure for electroless plated CoNiReP flexible disks with a NiMoP underlayer
TL;DR: In this article, two kinds of electroless-plated CoNiReP/NiMoP flexible disks were investigated from the viewpoint of forming a perpendicular recording medium containing an initial in-plane layer.
References
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A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys
Edmund C. Stoner,E. P. Wohlfarth +1 more
TL;DR: In this paper, the effect of shape anisotropy on magnetization curves was studied for the case of ellipsoidal spheroids of revolution (e.g., ellipses of revolution).
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The coercive force and rotational hysteresis of elongated ferromagnetic particles
S. Shtrikman,D. Treves +1 more
TL;DR: In this paper, the coercive force of an infinite ferromagnetic cylinder is calculated as a function of the radius and of the inclination of the axis to the applied field, assuming that only curling and rotation in unison take place and that whenever the curling is associated with a discontinuous jump, the magnetization is brought to the lower energy state given by Stoner and Wohlfarth.
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Magnetic Domain Structures in CoCr Films Studied by Lorentz Microscopy
Masatoshi Ohkoshi,Tetsuzo Kusuda +1 more
TL;DR: Magnetization distribution and behavior of magnetization in CoCr sputtered films of various thickness are studied by high-resolution Lorentz microscopy in this paper, where the authors show that magnetization reversal changes from the domain wall displacement mode in the 200 A thick film to the rotational mode in 1000 A thickness film.