Simulation of spin reorientation in cubic ferromagnets with defects

Influence of the magnetic field on the nucleation and properties of 0-degree domain walls in uniaxial films with inhomogeneous magnetoelectric interaction

“…However, there is another feature of the situation under consideration: with increasing h, the nucleation field 0 • DW (I) sharply decreases. In particular, at h = −0.8, there will be no generation threshold of 0 • DW (I) in the electric field, which correlates with the results of studies [23].…”

“…Moreover, under certain conditions, they can become stable formations; for example, they originate from certain types of defects in materials [20][21][22]. At the same time, they play an important role in spin-reorientation phase transitions of the first type, in which 0 • DW is the nucleus of a new phase, as if carrying out the transition of a magnet from one state to another through a fluctuation mechanism [23]), as well as in the processes of their magnetization and remagnetization, where they are associated with reverse magnetization domains [24]. At the same time, it should be noted that in the case of ferromagnetic films with the FME effect, magnetic inhomogeneities of the 0 • DW type have not been experimentally detected.…”

Quasibloch 0-Degree Domain Walls in Ferromagnet Films

“…Theoretical study of domain structure in unbounded cubic ferromagnetic samples with an induced uniaxial anisotropy is known to lead to solutions corresponding to 0-degree domain walls (0°DW) of the Bloch or Neel type [1]. Calculations show that they are the most relevant simulations of magnetic heterogeneities formed at crystal defects, allowing one to examine spin reorientation processes in real magnets.…”

“…Calculations show that they are the most relevant simulations of magnetic heterogeneities formed at crystal defects, allowing one to examine spin reorientation processes in real magnets. However, not all the aspects of the experimentally observed phase generation [2] can be investigated because of "inflexibility" of the considered model [1]. One of the obvious ways of widening limits of its application is to consider the influence of the finiteness of the film width on structure and properties of a 0°DW.…”

“…In the case of a film parallel to the Oxy plane (having width λ∆ 0 , where ∆ 0 is the characteristic width of DW [1]) with magnetization depending only on y coordinate we derive…”