期刊
PHYSICAL REVIEW B
卷 79, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.024404
关键词
ferromagnetic materials; magnetic domain walls; magnetisation; mixed state; nanotubes; nucleation; phase equilibrium
资金
- FONDECYT [1070224, 11080246]
- Millennium Science Initiative [P06-022-F]
- Bicentenario en Ciencia y TecnologIa (PBCT) [PSD-031]
- AGCI
- CONICYT
- PIIC USM (Chile)
- [USMDGIP 11.08.57]
We present a theory to describe the equilibrium states and nucleation phenomena in ferromagnetic tubular nanostructures. We show that, in a broad range of geometrical parameters, the magnetic state of a nanotube is a mixture of vortex states, at tube ends, and a uniform magnetization state along the tube axis. The incomplete vortex structures confined at the tube ends are growing domain walls which can be set in motion with external fields, current-driven techniques, or thermal assistance. We also show how the well-known nucleation problem can be better understood with basis in the theoretical model presented in this paper.
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