SPHERICAL AND CYLINDRICAL NUCLEATION CENTERS IN A BULK FERROMAGNET

被引：10

作者：

AHARONI, A ^{[1
]}

BALTENSPERGER, W ^{[1
]}

机构：

[1] WEIZMANN INST SCI,DEPT ELECTR,IL-76100 REHOVOT,ISRAEL

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.45.9842

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The process of nucleation of magnetization reversal in bulk materials, by creating pairs of one-dimensional, planar Block or Neel walls, is extended here to the creation of spherical or cylindrical nuclei. Numerical integration of the appropriate differential equation leads to a saddle point in energy, which gives the barrier to be overcome for reversing the magnetization. The results for both cases are rather similar to the planar ones, but for vanishingly small fields the energy of the nucleus of a reversal structure tends to infinity, which means that it takes some finite field for any reversal to nucleate.

引用

页码：9842 / 9849

页数：8

共 18 条

[1] THE CONCEPT OF A SINGLE-DOMAIN PARTICLE [J].