Magnetic phase transitions in FeRh-based alloys

The study of the mechanisms of first-order magnetic phase transitions is one of the urgent problems of modern physics. The complexity of determining these mechanisms is associated with the multitude of factors that play a significant role in the phase transition. FeRh-based alloys are among the most typical objects in which a first-order phase transition from the antiferromagnetic to the ferromagnetic state is observed. Despite the fact that the iron-rhodium alloy has a fairly simple crystal structure and does not change the symmetry of the crystal lattice during the phase transition, a number of features in the behavior of its physical properties are observed. The presented review describes current information on the influence of various external factors, the influence of crystal defects and dimensional features on the static and dynamic properties of FeRh-based alloys.