Magnetization and domain structure of bcc Fe81Ni19/Co (001) superlattices -: art. no. 064411

被引:36
|
作者
Brucas, R [1 ]
Hafermann, H [1 ]
Katsnelson, MI [1 ]
Soroka, IL [1 ]
Eriksson, O [1 ]
Hjörvarsson, B [1 ]
机构
[1] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden
来源
PHYSICAL REVIEW B | 2004年 / 69卷 / 06期
关键词
D O I
10.1103/PhysRevB.69.064411
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Dense stripe domains were observed for a Fe81Ni19/Co superlattice grown on a MgO(100) single crystal substrate using dc magnetron sputtering. The stripe domain period exhibits nonreversible changes with the magnetic field, as determined by magnetic force microscopy. We present a simple theoretical model for this system and calculate the magnetization and domain period as functions of the applied field by minimizing the total energy. For this purpose, an expression for the domain wall energy and wall width for arbitrary angles and one for the magnetostatic energy are derived. The model correctly predicts a decreasing domain period with the increasing applied field. At larger magnetic fields a transition to "chaotic" two-dimensional stripe patterns is observed and a qualitative discussion of this phenomenon is given.
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页数:11
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