Renormalization of the tunnel splitting in a rotating nanomagnet

Details Renormalization of the tunnel splitting in a rotating nanomagnet Renormalization of the tunnel splitting in a rotating nanomagnet

2010-11-13

arxiv.org/abs/1011.3134v1

Physical Review B 83, 092402 (2011) [4 pages]

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.83.092402

We study spin tunneling in a magnetic nanoparticle with biaxial anisotropy
that is free to rotate about its anisotropy axis. Exact instanton of the
coupled equations of motion is found that connects degenerate classical energy
minima. We show that mechanical freedom of the particle renormalizes magnetic
anisotropy and increases the tunnel splitting.

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