Journal
NANO LETTERS
Volume 12, Issue 12, Pages 6139-6144Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl302950u
Keywords
Magnetic nanotubes; cantilever magnetometry; magnetic tubular architectures; nanomagnetic states
Categories
Funding
- Canton Aargau
- Swiss National Science Foundation (SNF) [200020-140478]
- Swiss Nanoscience Institute
- National Center of Competence in Research for Quantum Science and Technology
- European Community [228673]
- MAGNONICS
- ICREA Funding Source: Custom
- Swiss National Science Foundation (SNF) [200020_140478] Funding Source: Swiss National Science Foundation (SNF)
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Recent experimental and theoretical work has focused on ferromagnetic nanotubes due to their potential applications as magnetic sensors or as elements in high-density magnetic memory. The possible presence of magnetic vortex states-states which produce no stray fields-makes these structures particularly promising as storage devices. Here we investigate the behavior of the magnetization states in individual Ni nanotubes by sensitive cantilever magnetometry. Magnetometry measurements are carried out in the three major orientations, revealing the presence of different stable magnetic states. The observed behavior is well-described by a model based on the presence of uniform states at high applied magnetic fields and a circumferential onion state at low applied fields.
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