Temperature-dependent domain investigations on exchange-biased IrMn-NiFe and IrMn-CoFe systems

被引：7

作者：

Seidel, R ^{[1
]}

de Haas, O

Schaefer, R

Schultz, L

Ruehrig, M

Wecker, J

机构：

[1] IFW Dresden, D-01069 Dresden, Germany

[2] Siemens AG, CT MM1, Innovat Elect, D-91052 Erlangen, Germany

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2002年 / 38卷 / 05期

关键词：

exchange bias; Kerr microscopy; magnetic domains; magnetic films;

D O I：

10.1109/TMAG.2002.803157

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 magnetic microstructure and magnetization processes of sputtered IrMn-NiFe exchange-biased films were studied by Kerr microscopy and magneto-optical magnetometry in a temperature range from room temperature to 200 degreesC. A ferromagnetic film in the exchange-biased state (as created by cooling a regular domain pattern or a saturated state from above the blocking temperature) is reversed in a patch-like way in applied magnetic fields, indicating inhomogeneities in the coupling. The domain processes are reversible far below the blocking temperature TB and get increasingly irreversible within a range of some 10 K around TB. Magnetic anisotropies in the ferromagnetic layer, though clearly visible above the blocking temperature, have no significant influence on exchange bias. A granular frozen-in domain pattern is observed in as-deposited bilayers, indicating the presence of local exchange bias even without annealing.

引用

页码：2776 / 2778

页数：3

共 6 条

[1] Exchange anisotropy - a review [J].