Thermal phenomena in IrMn exchange biased systems

被引：34

作者：

Fernández-Outón, LE

O'Grady, K

Carey, MJ

机构：

[1] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[2] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95120 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 95卷 / 11期

关键词：

D O I：

10.1063/1.1667811

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we report on a detailed study of reversal in the antiferromagnetic layer in IrMn-based exchange-biased systems. By a process of careful field cycling and heating with the antiferromagnet aligned in the opposite direction to the original set direction, we are able to study thermal activation over the energy barriers in the antiferromagnetic material. We find that the peak in the coercivity is observed, but in no way correlates to the blocking temperature. We conclude that the origin of the coercivity enhancement in exchange-biased systems lies in effects at the interface. (C) 2004 American Institute of Physics.

引用

收藏

页码：6852 / 6854

页数：3

相关论文

共 12 条

[1] IrMn spin-valves for high density recording [J].

Childress, JR ;

Carey, MJ ;

Wilson, RJ ;

Smith, N ;

Tsang, C ;

Ho, MK ;

Carey, K ;

MacDonald, SA ;

Ingall, LM ;

Gurney, BA .

IEEE TRANSACTIONS ON MAGNETICS, 2001, 37 (04) :1745-1748

[2] Properties of thin IrMn in exchange biased multilayers [J].

Eckert, JC ;

Stern, NP ;

Snowden, DS ;

Sparks, PD ;

Carey, MJ .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :6608-6610

[3] Low temperature properties of spin valves with extremely thin IrMn [J].

Eckert, JC ;

Stern, NP ;

Barton, AE ;

Mann, DA ;

Sparks, PD ;

Carey, MJ .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :8569-8571

[4] THERMAL FLUCTUATION AFTEREFFECT MODEL FOR SOME SYSTEMS WITH FERROMAGNETIC-ANTIFERROMAGNETIC COUPLING [J].

FULCOMER, E ;

CHARAP, SH .

JOURNAL OF APPLIED PHYSICS, 1972, 43 (10) :4190-&

[5] Exchange coupling in epitaxial CoO/NiFe bilayers with compensated and uncompensated interfacial spin structures -: art. no. 174422 [J].

Gökemeijer, NJ ;

Penn, RL ;

Veblen, DR ;

Chien, CL .

PHYSICAL REVIEW B, 2001, 63 (17)

[6] Magnetization reversal processes in exchange-biased spin-valve structures [J].

Goodman, AM ;

O'Grady, K ;

Laidler, H ;

Owen, NW ;

Portier, X ;

Petford-Long, AK .

IEEE TRANSACTIONS ON MAGNETICS, 2001, 37 (01) :565-570

[7] NEW MAGNETIC ANISOTROPY [J].

MEIKLEJOHN, WH ;

BEAN, CP .

PHYSICAL REVIEW, 1956, 102 (05) :1413-1414

[8] Measurement of the energy barrier distribution in the antiferromagnetic layer of exchange-biased materials [J].

O'Grady, K ;

Holloway, L ;

Antel, WJ .

IEEE TRANSACTIONS ON MAGNETICS, 2002, 38 (05) :2741-2743

[9]

O'Handley R. C, 2000, MODERN MAGNETIC MAT

[10]

SCHULER IK, 2003, ICM ROM