MAGNETIC PROPERTIES OF VACUUM EVAPORATED Co-O THIN FILM FOR PERPENDICULAR MAGNETIC RECORDING MEDIA

Tateno, Yasuo; Iwasaki, Katsunori; Naruse, Hiroji; Itoh, Takuya; Chubachi, Ryoji

doi:10.3379/jmsjmag.13.s1_813

Cited by 5 publications

(2 citation statements)

References 10 publications

(11 reference statements)

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“…For metal evaporated ͑ME͒ tape, the total magnetic anisotropy of the medium has been successfully separated into the magnetocrystalline anisotropy of each particle and the magnetic interaction anisotropy between particles. 12,13,35 The same procedure is applied to determine the origin of the magnetic anisotropy of CoPtCr/SiO 2 granular thin film longitudinal medium. In this article, the intrinsic magnetic anisotropy constants, K u1 and K u2 , are assumed to consist of those of each particle, K u1 (p) and K u2 (p), and those of interparticle interactions, K u1 (i) and K u2 (i).…”

Section: Breakdown Of the Total Magnetic Anisotropymentioning

confidence: 99%

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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Section: Breakdown Of the Total Magnetic Anisotropymentioning

confidence: 99%

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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“…There are, however, few reports relating to the recording characteristics of CO-O thin films [2][3][4][5][6], in which the incident angles are changed in a wide range from in-plane direction to perpendicular direction. This paper describes the incident angle dependence of the magnetic properties, the crystallographic structure, morphological structure and the recording characteristics.…”

Section: Introductionmentioning

confidence: 99%

Recording Characteristics of Obliquely Evaporated Thin Co-O Films

et al. 1994

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The dependence of the magnetic properties, crystallographic structure, morphological structure and recording characteristics on the angle of incidence were studied on the obliquely evaporated thin Co-O films. The preferred c-axis orientation angle of Co in Co-O films is almost equal to the minimum incident angle( e min), because the growth at the initial deposition stage around the maximum incident angle( emax) is very thin and has little magnetization due to oxidization. The Co-O film deposited at emin of 40· exhibits a maximum output at a recording density of 100kFCI, which is higher by 5dB than that of ME tape for a high-band 8mm VCR.

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Columnar grain structure in cobalt films deposited obliquely by introducing oxygen during sputtering

Itoh

Ichikawa

Ishida

et al. 2002

Journal of Magnetism and Magnetic Materials

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MAGNETIC PROPERTIES OF VACUUM EVAPORATED Co-O THIN FILM FOR PERPENDICULAR MAGNETIC RECORDING MEDIA

Cited by 5 publications

References 10 publications

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

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

Recording Characteristics of Obliquely Evaporated Thin Co-O Films

Columnar grain structure in cobalt films deposited obliquely by introducing oxygen during sputtering

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