| Switching Behaviour of Magnetic Particles with Dipolar Interaction |
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| 作者姓名： | 许晨 许伯铭 周卓宏 李振亚 |
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| 作者单位： | [1]DepartmentofPhysics,SuzhouUniversity,Suzhou215006 [2]DepartmentofPhysics,TheChineseUniversityofHongKong,Shatin,NewTerritories,HongKong [3]LaboratoryofSolidStateMicrostructures,NanjingUniversity,Nanjing210093／／DepartmentofPhysics,SuzhouUniversity,Suzhou215006 |
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| 摘 要： | We study the switching in the magnetic moments of interacting magnetic particles. The dynamics of the magnetic moments is governed by a coupled set of Landau-Lifshitz-Gilbert equations. The magnetic particles are assumed to be spherical in shape, single domain, and have uniaxial anisotropy. Effects of dipolar interaction between the particles, anisotropy energy, an applied switching field with finite spatial extent and a small bias field are considered. When the separation between the particles is small, the dipolar field is significant and it affects the reversal of the magnetic moments. The final configuration attained depends sensitively on the decaying length of the switching field, the inter-particle separation, and the initial configuration. A bias field tends to suppress the effects of a spatially decaying switching field and dipolar interaction between neighbouring particles.
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| 关 键 词： | 交换性质 磁粒子 偶极相互作用 磁力矩力学 纳米结构 |
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