Solid antiferromagnetic

Fig. 10.8. Temperature variation of the magnetic susceptibility (a) and the effective magnetic moment (b) for a heterospin system SA = 1/2 and = 1 gA = 2.0, gB = 2.0, solid— antiferromagnetic coupling (J/k = —100 K) dashed—ferromagnetic coupling (J/k — +100 K).

H. Alfven (Stockholm) discoveries in magneto-hydrodynamics with fruitful applications in different parts of plasma physics. L. Neel (Grenoble) discoveries concerning antiferromagnetism and ferrimagnetism which have led to important applications in solid state physics. 

Di-/-butyl-6-aminothiophenol gives complex (497) under strictly anaerobic conditions. In the presence of air, deep blue-violet solutions are obtained from which mixtures of solid deep blue-black cis/trans-(498) can be isolated.1345 For the square planar Ni complex, the cis-trans isomerization rate is fast. (498) is best described as a singlet diradical due to strong antiferromagnetic coupling of the benzosemiquinonate 7r-radicals.19, 134S... 

The monomeric diradical [SSSNC-CNSSS][AsF6]2, like 7[AsF6] (R=CF3), is paramagnetic in the solid state. A broad maximum in % at 60 K is indicative of short-range antiferromagnetic coupling.94... 

Figure S6.1 Magnetic structures (a) paramagnetic solid, (b) ferromagnetic ordering, (c) antiferromagnetic ordering, and (d) ferrimagnetic ordering. The magnetic dipoles on atoms are represented by arrows.

Cyclic voltammetry revealed four reversible one-electron oxidation processes. The ground state structures for HOC and HOC " are aromatic . The structures for HOC" and HOC " are doublets and show Jahn-Teller distortions. The structures for HOC " in the solid is a Jahn-Teller distorted, closed-shell singlet with a canonical structure [37 ], as represented by cyanine/p-phenylenediammonium fragments. The one-to-one complex of HOC" TCNE" was indeed synthesized but found to be antiferromagnetic. 

Dzyaloshinsky, I. E. A thermodynamic theory of weak" ferromagnetism of antiferromagnets. J. Phys. Chem. Solids 4, 241 (1958). 

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