Quantum depinning of the magnetic vortex core in micron-size permalloy disks

Details Quantum depinning of the magnetic vortex core in micron-size permalloy disks Quantum depinning of the magnetic vortex core in micron-size permalloy disks

2011-11-26

arxiv.org/abs/1111.6171v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

The vortex state, characterized by an in-plane closed flux domain structure and an out-of-plane magnetization at its centre (the vortex core), is one of the magnetic equilibria of thin soft ferromagnetic micron-size dots. In the last two decades many groups have been working on the dynamics of the magnetic moment in nanomagnetic materials at low temperatures, it giving rise to the observation of quantum relaxations and quantum hysteresis cycles. For the first time, we report experimental evidence of quantum dynamics of the vortex core of micron-size permalloy (Fe$_{19}$Ni$_{81}$) disks induced by the application of an in-plane magnetic field. It is attributed to the quantum tunneling of the vortex core through pinning barriers, which are associated to structural defects in the dots, towards its equilibrium position.

Affiliated with

Also associated with

No associations

Rating

Quantum depinning of the magnetic vortex core in micron-size permalloy disks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum depinning of the magnetic vortex core in micron-size permalloy disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum depinning of the magnetic vortex core in micron-size permalloy disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-483983