73 research outputs found
Electromechanical Magnetization Switching
We show that the magnetic moment of a composite multiferroic torsional
oscillator can be switched by the electric field. The 180 switching arises
from the spin-rotation coupling and is not prohibited by the different symmetry
of the magnetic moment and the electric field as in the case of a stationary
magnet. Analytical equations describing the system have been derived and
investigated numerically. Phase diagrams showing the range of parameters
required for the switching have been obtained.Comment: 7 pages, 5 figure
Renormalization of the tunnel splitting in a rotating nanomagnet
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.Comment: 4 pages, 3 figure
- …