Discrimination between coupling and anisotropy fields in exchange-biased bilayers

被引：12

作者：

Geshev, J. ^{[1
]}

Nicolodi, S. ^{[1
]}

da Silva, R. B. ^{[2
]}

Nogues, J. ^{[3
,4
]}

Skumryev, V. ^{[3
,5
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Pampa, Ctr Ciencias Exatas & Tecnol, BR-96570000 Cacapava Do Sul, RS, Brazil

[3] ICREA, Barcelona 08010, Spain

[4] Ctr Invest Nanociencia & Nanotecnol ICN CSIC, Barcelona 08193, Spain

[5] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 05期

关键词：

antiferromagnetic materials; cobalt; coercive force; enhanced magnetoresistance; ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic domain walls; magnetic hysteresis; magnetic susceptibility; magnetic thin films; manganese alloys; THICKNESS DEPENDENCE; CO/COO; FILMS; MAGNETORESISTANCE; COERCIVITY; SYSTEMS; MODEL;

D O I：

10.1063/1.3079795

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the framework of models that assume planar domain wall formed at the antiferromagnetic part of the interface of exchange-biased bilayers, one cannot distinguish between the cases of high or low ratios between the coupling and the antiferromagnet's anisotropy fields by using hysteresis loop measurement, ferromagnetic resonance, anisotropic magnetoresistance, or ac susceptibility techniques applied on one and the same sample. The analysis of the experimental data obtained on a series of FeMn/Co films indicated that once the biasing is established the variation in the coercivity with the FeMn layer thickness could be essential for solving this problem. If the coercivity decreases with the thickness then the interlayer exchange coupling is the parameter that varies while the domain-wall energy of the antiferromagnet remains practically constant.

引用

页数：6