Quantum-classical crossover of the escape rate in the biaxial nanomagnets with a higher order symmetry

Abstract

The crossover of the escape rate between thermally assisted and pure quantum tunneling is studied in biaxial magnetic nanoparticles with a high symmetry. The sequential crossover occurs in the presence of field applied along the hard axis. Molecular nanomagnets with larger transverse anisotropy are expected to make the peculiar crossovers more feasible in experiment.