Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls

Details Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls

1997-10-07

arxiv.org/abs/cond-mat/9710064v1

Phys. Rev. B 56 (1997) 8129-8137

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 2 postscript figures, REVTeX

Scientific paper

10.1103/PhysRevB.56.8129

Quantum tunneling of domain walls out of an impurity potential in a mesoscopic ferromagnetic sample is investigated. Using improved expressions for the domain wall mass and for the pinning potential, we find that the cross-over temperature between thermal activation and quantum tunneling is of a different functional form than found previously. In materials like Ni or YIG, the crossover temperatures are around 5 mK. We also find that the WKB exponent is typically two orders of magnitude larger than current estimates. The sources for these discrepancies are discussed, and precise estimates for the transition from three-dimensional to one-dimensional magnetic behavior of a wire are given. The cross-over temperatures from thermal to quantum transitions and tunneling rates are calculated for various materials and sample sizes.

Affiliated with

Also associated with

No associations

Rating

Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls 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 Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-203805