Abstract

The paper studies the magnetization and demagnetization of a stable, spin-polarized impurity interacting with phonons and magnons, dubbed blended-ferron in an antiferromagnetic cluster and subjected to an external magnetic field. The weak magnetic field is observed enhance local magnetic reordering and blended-ferron formation. Strong magnetic field enhances ferron demagnetization (with excess spin-down population 0ph,0mag,↓ ) imitating optical polaron characteristics and enhanced ferron magnetization for excess spin-up population 0ph,0mag,↑. For the critical magnetic field, the blended ferron achieves infinite effective mass and exhibits ferromagnetism leading to a spin flop phenomenon. The spin exchange energy is observed to be modified by the phonons which together with the magnons are responsible for the blended-ferron characteristics.

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