Antiferromagnetic crystal

We shall illustrate this technique by application to two magnetic structures that exist in nature. Consider the rutile structure associated with the antiferromagnetic crystal MnF2. Figure 12-4 shows the non-... 

Cp.m = aT3 (antiferromagnetic crystals below the magnetic transition temperature if it occurs at low T (4.8)... 

In this section, in discussing a typical antiferromagnetic crystal like MnO, we suppose as indicated in the last section that each Mn2 + ion has a moment due to its five electrons lined up by Hund s rule, and that the crystal is an insulator. 

Cp - ml3 antiferromagnetic crystals below the magnetic transition temperature... 

Figure 2. Dependence of the longitudinal component of the magnetization on the intensity of the magnetic held, parallel to the symmetry axis of an antiferromagnetic crystal with uniaxial anisotropy [30].

K.L. Dudko, (1971) Experimental evidence for existence of domain structure at the first order phase transition in antiferromagnetic crystals. - Thesis, Institute for Low Temperature Physics, Kharkov, 1971. 

All the examples described above show that confinement in different cases may be responsible for nonmonotonic relaxation kinetics and can lead to a saddle-like dependence of relaxation time versus temperature. However, this is not the only possible reason for nonmonotonic kinetics. For instance, work [258] devoted to the dielectric study of an antiferromagnetic crystal discusses a model based on the idea of screening particles. Starting from the Arrhenius equation and implying that the Arrhenius activation energy has a linear dependence on the concentration of screening charge carriers, the authors of Ref. 258 also obtained an expression that can lead to nonmonotonic relaxation kinetics under certain conditions. However, the experimental data discussed in that work does not show clear saddle-like behavior of relaxation time temperature dependence. The authors of Ref. 258 do not even discuss such a possibility. 

Magnon - A quantum of magnetic energy associated with a spin wave in a ferromagnetic or antiferromagnetic crystal. 

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