Anisotropy exchange

Two excellent examples of ferromagnetic chains with measurable exchange anisotropy are the isotropic cyclohexy-lammonium copper trichloride and tribromide, CHAC and... 

Mssbauer spectroscopy The inclusion of anisotropic fluctuations, modeled as T+ T in uniaxial symmetry, in the presence of applied magnetic fields, exchange anisotropy, or inter-particle interactions, must be used as a starting assumption unless the more restricted assumption that all relevant fluctuations are much faster than the measurement frequency (x+, t Xm, in uniaxial symmetry) is justified independently. All other relevant realistic features (distributions of characteristics and properties ) must also be included, by applying as many justified theoretical constraints as possible. 

Table 5 Spin levels (Ei,i = 1 ), /T (in cm. K/mol) values at (in °K) corresponding to maximum anisotropy of the main values of the susceptibility /ii(ii = xx, yy, zz) tensor, /avr[Xav = (l/3)(Xxx + Xyy + Xzz)] and anisotropic D12 and A12 tensor parameters of a Fe -CN-Cu" model complex with and without trigonal Jahn-TeUer distortions from model calculations accounting for the difference of Je and Jb2 exchange coupling parameters (exchange anisotropy) or alternatively, assuming an isotropic Heisenberg exchange (1 = 1e = 1b2)...

Fig. 17. (a) Magnetic exchange constants and (b) exchange anisotropy (T and dotted line) and inverse correlation length (4 and solid line) obtained for NdBajCujOj (Allenspach et al. 1995). 

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