Multi-vortex states in magnetic nanoparticles

• Main Authors: Gan, W. L., Chandra Sekhar, M., Wong, D. W., Purnama, I., Chiam, S. Y., Wong, L. M., Lew, W. S.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Physics::Atomic physics::Solid state physics
• Online Access: https://hdl.handle.net/10356/101721; http://hdl.handle.net/10220/24221
• Institution: Nanyang Technological University

We demonstrate a fabrication technique to create cylindrical NiFe magnetic nanoparticles (MNPs) with controlled dimensions and composition. MNPs thicker than 200 nm can form a double vortex configuration, which consists of a pair of vortices with opposite chirality. When MNPs thicker than 300 nm are...