Axial magnetic field produced by axially and radially magnetized permanent rings

被引：30

作者：

Peng, QL

McMurray, SM

Coey, JMD

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

[2] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 268卷 / 1-2期

关键词：

current loop; current disk; axial gradient field; axially magnetized permanent ring; radially magnetized permanent ring;

D O I：

10.1016/S0304-8853(03)00494-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Axial magnetic fields produced by axially and radially magnetized permanent magnet rings were studied. First, the axial magnetic field produced by a current loop is introduced, from which the axial field generated by an infinitely thin solenoid and by an infinitely thin current disk can be derived. Then the axial fields produced by axially and by radially magnetized permanent magnet rings can be obtained. An analytic formula for the axial fields produced by two axially magnetized rings is given. A permanent magnet with a high axial gradient field is fabricated, the measured results agree with the theoretical calculation very well. As an example, the axial periodic field produced by an arrangement of alternating axially and radially magnetized rings has been discussed. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：165 / 169

页数：5