Micromagnetic phase transitions and spin wave excitations in a ferromagnetic stripe

被引：81
|
作者：
Bailleul, M [1 ]
Olligs, D [1 ]
Fermon, C [1 ]
机构：
[1] CEA Saclay, Serv Phys Etat Condense, DRECAM, DSM, F-91191 Gif Sur Yvette, France
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.91.137204
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Magnetic excitations of micrometer-wide ferromagnetic stripes subjected to a transverse applied field have been measured between 1 and 20 GHz . The complexity of the observed response is attributed to the spatially nonuniform equilibrium spin distribution. This one is modeled analytically and numerically, which allows one to distinguish two micromagnetic phases governing the ground state. The nucleation-related phase transitions are evidenced by soft modes, while the different observed resonances are attributed to spin wave modes localized in the two phases and at their interface.
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页数：4
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