Control of magnetization states in microstructured permalloy rings

被引：58

作者：

Steiner, M

Nitta, J

机构：

[1] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[2] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany

[3] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany

[4] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 06期

关键词：

D O I：

10.1063/1.1646223

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetization processes of microstructured NiFe rings are studied by the fringe-field-induced local Hall effect and numerical model calculations. The changes in reversible and irreversible magnetization of single rings are detected with very high resolution. We observe that the type of magnetic transition depends on the ratio between the inner and outer ring diameter. For narrow rings, sharp transitions from so-called "onion" to the "vortex" state are observed. In rings with smaller inner diameter, the transitions are more complex. The creation of local vortices and their spatial movement by applying an external magnetic field are detected. (C) 2004 American Institute of Physics.

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页码：939 / 941

页数：3

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