Recording and Noise Properties of a Co-Cr-Nb Perpendicular Medium.

智, 梁瀬; 貴則, 木谷; 直樹, 本多; 一弘, 大内

doi:10.3379/jmsjmag.20.161

Cited by 7 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and a represent the saturation magnetization, the medium thickness, the perpendicular squareness and the slope of perpendicular M-H loop (41tMr/Hc), respectively. We reported that a Nb added Co-Cr fihn showed lower noise characteristics than in the case of Ta addition [4]. While it was also reported that a high Cr content Co-Cr medium showed low noise characteristics [5].…”

Section: Introductionmentioning

confidence: 79%

Low Noise Recording Medium Design with Co-Cr-Nb Film

1997

View full text Add to dashboard Cite

Abstract---A low noise medium design is described focussing on Co-Cr-Nb films. Targeted magnetic parameters for a low noise medium (Ms -200 emu/cm 3 , Hcl. > 2500 De, Hc/Hkl. > 1/3) are presumed by considering M-H loops ofCo-Cr films. Only Co-CrNb films with high Cr contents could satisfy these parameters when deposited with a substrate temperature of 600 "C. The high deposition temperature was adopted according to the elevated transition temperature of about 500 "C at which Cr microsegregation in the film becomes enhanced. Magnetic properties of the film was also supported by a highly oriented Ti underlayer. In the crystallographic point of view, a Co-Cr-Nb film was found to have a more continuous structure in the film thickness direction than a Co-CrTa film.

show abstract

Section: Introductionmentioning

confidence: 79%

Low Noise Recording Medium Design with Co-Cr-Nb Film

1997

View full text Add to dashboard Cite

show abstract

“…The NL TS for the combination of double-layered perpendicular recording medium and single-pole type recording head has been reported to be low at 318 kFCI [9]. On the other hand, the NL TS has not been systematically investigated for the combination of single-layered perpendicular recording medium and ring head recording, though the high potential for increasing the areal density was well studied [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Transition Shift in the Combination of Single-layered Perpendicular Recording Medium and Ring Head

et al. 1997

View full text Add to dashboard Cite

Nonlinear transitIOn shifts (NL TS) in the combination of single-layered perpendicular recording media and ring head writing are investigated by read/write experiments employing the fifth harmonic elimination method. The NLTS of single-layered perpendicular recording medium can be kept at the low level at high linear recording densi ty. The NL TS smaller than 10 % is observed at 300 kFCI for a 25 nm thick CoCrPt perpendicular recording medium. Decreasing the medium thickness improves the NL TS.

show abstract

“…We have reported the effect of the third additive metals (Nb, Ta, Zr, Pt) on magnetic properties ofCo-Cr alloy thin film media [2], [3]. The addition of Nb to Co-Cr film has almost the same magnetic effect as that of Ta [2], [3], [4] but has an advantage of the low noise property [3], [5]. Addition of Nb more than 10 at% to Co would result in an amorphous structure, on the other hand, addition ofY less than 5 at% to Co would result in an amorphous structure [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Additives on Magnetic Properties in Co-Cr Perpendicular Anisotropy Magnetic Film

et al. 1997

View full text Add to dashboard Cite

The effects of yttrium as the third additive metals on magnetic properties of Co-Cr alloy thin film media with a high saturation magnetization (Ms) have been studied. It was found that 1.4 at% Y addition to Co-Cr caused 50-100°C higher substrate temperature for the maximum value in Ms, perpendicular coercivities (He) and anisotropy fields (Hk) than that of Co-Cr, and the maximum values of both Hc.L and Hk for Co-CrY were larger than that for Co-Cr. Y added films have less initial layer than the other Co-Cr alloy films. Addition of Y seemed successful in reducing the degree of magnetic coupling between particles. The region for Hc.L greater than 2000 Oe in the mapping on film thickness and substrate temperature was broadened by Y addition in terms of magnetic film thickness. The ratio ofHc/Hk for the Y addition was the highest among those for the other elements additions.

show abstract

Recording and Noise Properties of a Co-Cr-Nb Perpendicular Medium.

Cited by 7 publications

References 12 publications

Low Noise Recording Medium Design with Co-Cr-Nb Film

Low Noise Recording Medium Design with Co-Cr-Nb Film

Nonlinear Transition Shift in the Combination of Single-layered Perpendicular Recording Medium and Ring Head

Effect of Additives on Magnetic Properties in Co-Cr Perpendicular Anisotropy Magnetic Film

Contact Info

Product

Resources

About