Computer simulation of thermal activation volume in HDD media

被引：7

作者：

Igarashi, M ^{[1
]}

Akagi, F

Sugita, Y

机构：

[1] Hitachi Ltd, Cent Res Lab, Kokubunji, Tokyo 1858601, Japan

[2] Tohoku Inst Technol, Taihaku Ku, Sendai, Miyagi 9828577, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2001年 / 37卷 / 04期

关键词：

dynamic coercivity; remanence; switching volume; thermal activation;

D O I：

10.1109/20.950849

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The thermal activation volume in hard-disk media was investigated through micro-magnetic simulation. It was found that the activation volume should be obtained by using the time-dependant irreversible magnetization (viscosity). The method using the total magnetization including the reversible magnetization leads to a wrong dependence of the activation volume on the field. The relationship between the switching volume in a hard-disk medium and the activation volume is described as a function of the exponent of the dynamic coercivity, the switching field, and the anisotropy field.

引用

页码：1386 / 1388

页数：3

共 10 条

[1] Activation volume and correlation to media noise in high-density longitudinal recording media [J].

Acharya, BR ;

Suzuki, T ;

Takano, K .

IEEE TRANSACTIONS ON MAGNETICS, 1999, 35 (05) :2652-2654

[2] Numerical simulations of the effect of record field pulse length on medium coercivity at finite temperatures [J].

Bertram, HN ;

Peng, QZ .

IEEE TRANSACTIONS ON MAGNETICS, 1998, 34 (04) :1543-1545

[3] High speed switching in magnetic recording media [J].

Chantrell, RW ;

Hannay, JD ;

Wongsam, M ;

Lyberatos, A .

IEEE TRANSACTIONS ON MAGNETICS, 1998, 34 (02) :349-354

[4] Experimental study of thermal decay in high-density magnetic recording media [J].

Hosoe, Y ;

Tamai, I ;

Tanahashi, K ;

Takahashi, Y ;

Yamamoto, T ;

Kanbe, T ;

Yajima, Y .

IEEE TRANSACTIONS ON MAGNETICS, 1997, 33 (05) :3028-3030

[5] Computer simulation of magnetization switching behavior in high-data-rate hard-disk media [J].

Igarashi, M ;

Akagi, F ;

Nakamura, A ;

Ikekame, H ;

Takano, H ;

Yoshida, K .

IEEE TRANSACTIONS ON MAGNETICS, 2000, 36 (01) :154-158

[6]

IGARASHI M, IN PRESS IEEE T MAGN

[7] The fluctuation field of ferromagnetic materials [J].

Lyberatos, A ;

Chantrell, RW .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (12) :2623-2643

[8] THE COEFFICIENT OF MAGNETIC VISCOSITY [J].

WOHLFARTH, EP .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1984, 14 (08) :L155-L159

[9] Fluctuation fields and medium noise in CoCrTa and CoCrPt films [J].

Yamanaka, K ;

Yamamoto, T ;

Tanahashi, K ;

Inaba, N ;

Hosoe, Y ;

Uesaka, Y ;

Futamoto, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 152 (03) :411-416

[10]

YAMANAKA K, COMMUNICATION

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