Abstract
The results of experimental investigations of the magnetic properties of the antiferromagnetic alloy Fe0.765Mn1.185As are presented. They show that at atmospheric pressure and temperatures below 65 K the antiferromagnetic state is not the only stable state, since the imposition of a magnetic field in this temperature range makes it possible to observe irreversible induced transitions into a state with a canted ferrimagnetic structure. This is a second stable state for the experimental sample. As the temperature increases, this state vanishes via a first-order phase transformation at 65 K. Above 65 K reversible induced first-order transitions from the antiferromagnetic into a canted ferrimagnetic structure are observed. The results are discussed on the basis of a phenomenological expression for the free energy of a system with two interacting magnetic-order parameters. It is shown that a simple phenomenological model qualitatively describes the behavior of the system investigated. A single-band Hubbard model is used to give a microscopic substantiation of the phenomenological approach.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
