Renormalization of the tunnel splitting in a rotating nanomagnet

Abstract

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.

4 pages, 3 figures

References in corpus (3)

• Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets
• Gate-tuned high frequency response of carbon nanotube Josephson junctions
• Rotational Doppler Effect in Magnetic Resonance