Magnetic Field Perturbations to a Soft X-ray-Activated Fe (II) Molecular Spin State Transition

The X-ray-induced spin crossover transition of an Fe (II) molecular thin film in the presence and absence of a magnetic field has been investigated. The thermal activation energy barrier in the soft X-ray activation of the spin crossover transition for [Fe{H2B(pz)(2)}(2)(bipy)] molecular thin films is reduced in the presence of an applied magnetic field, as measured through X-ray absorption spectroscopy at various temperatures. The influence of a 1.8 T magnetic field is sufficient to cause deviations from the expected exponential spin state transition behavior which is measured in the field free case. We find that orbital moment diminishes with increasing temperature, relative to the spin moment in the vicinity of room temperature.

Automated summary

The X-ray-induced spin crossover transition of an Fe (II) molecular thin film was studied with and without a magnetic field. The thermal activation energy barrier for this transition was found to decrease in the presence of a magnetic field, leading to deviations from the expected spin state transition behavior. Additionally, the orbital moment was observed to decrease with increasing temperature relative to the spin moment near room temperature.