Nonuniform thermal reversal in single-domain patterned media

被引：4

作者：

Dittrich, R ^{[1
]}

Schrefl, T ^{[1
]}

Suess, D ^{[1
]}

Scholz, W ^{[1
]}

Fidler, J ^{[1
]}

机构：

[1] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2004年 / 40卷 / 04期

关键词：

energy barriers; intergrain coupling; minimum energy path; nonuniform reversal modes; nudged elastic band method; patterned media; single-domain particle; thermal stability;

D O I：

10.1109/TMAG.2004.834204

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：

Patterned media shows great potential for future ultrahigh-density magnetic recording. The thermal stability is determined by the relevant transition states. We apply the nudged elastic band method to calculate energy barriers and thermal reversal modes as a function of the island size and intergrain exchange coupling. Nonuniform reversal modes and transition states are found even in single-domain islands. The resulting energy barriers are significantly lower than those estimated from simplified reversal modes.

引用

页码：2507 / 2509

页数：3

共 6 条

[1]

Cohen S. D., 1996, Computers in Physics, V10, P138

[2]

Dittrich R, 2002, J MAGN MAGN MATER, V250, pL12, DOI 10.1016/S0304-8853(02)00388-8

[3] A climbing image nudged elastic band method for finding saddle points and minimum energy paths [J].

Henkelman, G ;

Uberuaga, BP ;

Jónsson, H .

JOURNAL OF CHEMICAL PHYSICS, 2000, 113 (22) :9901-9904

[4] Magnetic recording: advancing into the future [J].

Moser, A ;

Takano, K ;

Margulies, DT ;

Albrecht, M ;

Sonobe, Y ;

Ikeda, Y ;

Sun, SH ;

Fullerton, EE .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2002, 35 (19) :R157-R167

[5] Time resolved micromagnetics using a preconditioned time integration method [J].

Suess, D ;

Tsiantos, V ;

Schrefl, T ;

Fidler, J ;

Scholz, W ;

Forster, H ;

Dittrich, R ;

Miles, JJ .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 248 (02) :298-311

[6] Patterned media: A viable route to 50 Gbit/in(2) and up for magnetic recording? [J].

White, RL ;

New, RMH ;

Pease, RFW .

IEEE TRANSACTIONS ON MAGNETICS, 1997, 33 (01) :990-995

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