Magnetic interaction fields and switching field distribution in metal evaporated tape

Tateno, Yasuo

doi:10.1016/s0304-8853(01)01155-6

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Methods based on first-order reversal curve (FORC) distributions have been proposed as tools to determine the SFD [64][65][66][67]. A variation on this theme which relies neither on a constant demagnetizing field or a mean-field approximation has been put forth by Winklhofer and Zimanyi [68].…”

Section: Article In Pressmentioning

confidence: 99%

Recording media research for future hard disk drives

Piramanayagam

Srinivasan

2009

Journal of Magnetism and Magnetic Materials

136

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Section: Article In Pressmentioning

confidence: 99%

Recording media research for future hard disk drives

Piramanayagam

Srinivasan

2009

Journal of Magnetism and Magnetic Materials

136

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Magnetic anisotropy derived from interparticle interactions in CoPtCr/SiO2 granular thin film longitudinal media

Tateno

Katakura

Igari

et al. 2003

Journal of Applied Physics

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High field ferromagnetic resonance measurements of the anisotropy field of longitudinal recording thin-film media Magnetic and structural properties of hexagonal-close-packed-CoCrPt-C granular media for high areal density recordingThe magnetic anisotropy derived from interparticle interactions in a CoPtCr/SiO 2 granular thin film longitudinal medium has been experimentally studied. In order to clarify the effect of magnetostatic interactions between particles in the medium, the angular dependence of the interaction fields has been investigated. The interaction fields in the medium were obtained from the remanent magnetization curves measured in several directions in the plane normal to the medium plane by compensating for the demagnetizing fields at each measurement direction. It has been shown that the interparticle interactions in the medium exhibit clear anisotropy, which is related to the magnetostatic interactions. As a result, the intrinsic magnetic anisotropy of the medium has been quantitatively separated into two contributions, the magnetic interaction anisotropy between particles and the anisotropy of each particle. The magnetic anisotropy caused by the interparticle interactions in the medium plays an important role in the thermal stability of the magnetization in the recorded media, in the minor-loop magnetizing process and in the recording process of the medium when using a ring-type head.

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Determination of intrinsic switching field distributions in perpendicular recording media (invited)

Berger

Lengsfield

Ikeda

2006

Journal of Applied Physics

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We describe a method for the experimental characterization of intrinsic switching field distributions in perpendicular media. The method is based upon a comparison between the major loop and a set of recoil loops, which start at a certain distance ΔM away from saturation. In particular, we measure the applied field difference ΔH between the recoil loops and the major loop at identical M values, for which the average demagnetizing fields are the same. By analyzing complete ΔH(M,ΔM) data sets taken from multiple recoil loops, we gain a detailed measure of the intrinsic switching field distribution D(HS). We have also studied the reliability and precision of this method by means of micromagnetic modeling and find it to be robust and overall very precise in reproducing the input parameters. In particular, the method is sufficiently insensitive to intergranular exchange coupling as long as it is only moderate in strength. Using polar-Kerr effect measurements of recording disk samples, we demonstrate the capabilities of our approach and its suitability for being a practical characterization tool for perpendicular recording media.

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Magnetic interaction fields and switching field distribution in metal evaporated tape

Cited by 3 publications

References 14 publications

Recording media research for future hard disk drives

Recording media research for future hard disk drives

Magnetic anisotropy derived from interparticle interactions in CoPtCr/SiO2 granular thin film longitudinal media

Determination of intrinsic switching field distributions in perpendicular recording media (invited)

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