Amorphous antiferromagnetic

Explain the differences between geometric frustration, the spin-glass state, and Simpson s amorphous antiferromagnetism. 

Nickel(II) oxide crystallizes in the NaCl structure. Thin amorphous films of it exhibit electrochromic behavior and are antiferromagnetic at Tn = 247 °C. Nickel(II) oxide films with smooth surfaces and columnar structures of preferred (100) orientation on MgO(lll), Si(lll), soda lime glass, fused silica and stainless steel can be obtained by and... 

For a two-sublattice antiferromagnet, one simply has two coupled single-ion equations such as Equation (15) that are simultaneously solved selfconsistently for the two sublattice average moments. A p-sublattice material gives rise to p coupled equations and presents no special difficulty. The MFT method has been generalized to random, disordered, and amorphous magnetic materials by Rancourt et al. (1993). 

The water-insoluble, green NiO is obtained by thermal decomposition of NiC03 or Ni(N03)2 and crystallizes with the NaCl structure thin amorphous films of NiO exhibiting electrochromic behaviour (see Box 22.4) may be deposited by CVD (chemical vapour deposition, see Section 27.6) starting from [Ni(acac)2]. Nickel(II) oxide is antiferromagnetic... 

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