Quantum Nucleation in a Ferromagnetic Film Placed in a Magnetic Field at an Arbitrary Angle

TL;DR

This paper investigates how the orientation and strength of a magnetic field influence quantum nucleation and crossover temperature in a thin ferromagnetic film, revealing optimal conditions at specific angles rather than aligned with the field.

Contribution

It provides a detailed analysis of the angular dependence of quantum nucleation rates and crossover temperatures in ferromagnetic films under arbitrary magnetic field orientations.

Findings

Maximum nucleation rate occurs at a specific angle, not aligned with the magnetic field.

Crossover temperature varies with field angle and strength.

Quantum nucleation behavior depends critically on field orientation.

Abstract

We study the quantum nucleation in a thin ferromagnetic film placed in a magnetic field at an arbitrary angle. The dependence of the quantum nucleation and the temperature of the crossover from thermal to quantum regime on the direction and the strength of the applied field are presented. It is found that the maximal value of the rate and that of the crossover temperature are obtained at a some angle with the magnetic field, not in the direction of the applied field opposite to the initial easy axis.