Observation of Magnetic Supercooling of the Transition to the Vortex State

Abstract

We demonstrate that the transition from the high-field state to the vortex state in a nanomagnetic disk shows the magnetic equivalent of supercooling. This is evidence that this magnetic transition can be described in terms of a modified Landau first-order phase transition. To accomplish this we have measured the bulk magnetization of single magnetic disks using nanomechanical torsional resonator torque magnetometry. This allows observation of single vortex creation events without averaging over an array of disks or over multiple runs.

11 pages preprint, 4 figures, accepted to New Journal of Physics

References in corpus (2)

• Nano-Torsional Resonator Torque Magnetometry
• Temperature dependent nucleation and annihilation of individual magnetic vortices

Cited by in corpus (8)

• Approaching the Standard Quantum Limit of Mechanical Torque Sensing
• Nanoscale Torsional Optomechanics
• A Deformable Model for Magnetic Vortex Pinning
• Landau-Zener dynamics of a nanoresonator containing a tunneling spin
• Thermo-mechanical sensitivity calibration of nanotorsional magnetometers
• High-Q Gold and Silicon Nitride Bilayer Nanostrings
• Effect of perpendicular uniaxial anisotropy on the annihilation fields of magnetic vortices
• Broadband optomechanical transduction of nanomagnetic spin modes