Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media

H. Uwazumi; T. Shimatsu; Y. Sakai; A. Otsuki; I. Watanabe; H. Muraoka; Y. Nakamura

doi:10.1109/20.950911

Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media

H. Uwazumi, T. Shimatsu, Y. Sakai, A. Otsuki, I. Watanabe, H. Muraoka, Y. Nakamura

Research output: Contribution to journal › Conference article › peer-review

19 Citations (Scopus)

Abstract

The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, K_u, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an M_r/M_s value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of K_u and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.

Original language	English
Pages (from-to)	1595-1598
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.950911
Publication status	Published - 2001 Jul 1
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11

Keywords

CoCrPt-(Ta, B)
Media noise performances
Microstructure
Perpendicular recording media
Thermal agitation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media",

abstract = "The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, Ku, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an Mr/Ms value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of Ku and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.",

keywords = "CoCrPt-(Ta, B), Media noise performances, Microstructure, Perpendicular recording media, Thermal agitation",

author = "H. Uwazumi and T. Shimatsu and Y. Sakai and A. Otsuki and I. Watanabe and H. Muraoka and Y. Nakamura",

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T1 - Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media

AU - Uwazumi, H.

AU - Shimatsu, T.

AU - Sakai, Y.

AU - Otsuki, A.

AU - Watanabe, I.

AU - Muraoka, H.

AU - Nakamura, Y.

PY - 2001/7/1

Y1 - 2001/7/1

N2 - The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, Ku, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an Mr/Ms value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of Ku and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.

AB - The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, Ku, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an Mr/Ms value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of Ku and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.

KW - CoCrPt-(Ta, B)

KW - Media noise performances

KW - Microstructure

KW - Perpendicular recording media

KW - Thermal agitation

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