3D time-resolved analysis of the evolution metamagnetic phase transition in FeRh system

The FeRh alloy is an attractive material for studies of magnetic first-order phase transitions. The phase transition in FeRh from an antiferromagnetic to the ferromagnetic state is accompanied by the nucleation, growth, and merging of ferromagnetic clusters. The ferromagnetic phase evolution is studied in detail, and its various stages are distinguished. Both static properties and phase transition kinetics (time dependences of magnetization) are investigated. A comprehensive analysis allows us to determine the ferromagnetic phase nucleation regions and the main features of phase growth. In addition, the mechanisms that lead to a change in the ferromagnetic phase growth rate (the limitation effect and the magnetocaloric effect) were determined. The variation of phase transition evolution dominant mechanisms depending on the sample microstructure was shown.

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