Ferrimagnetic chains

Baron, V., Gillon, B., Cousson, A. et al. (1997) Spin density maps for the ferrimagnetic chain compound MnCu(pba)(H20)3. 2H20 (pba = l,2-propylenebis(oxamato)) polarized neutron diffraction and theoritical studies, J. Am. Chem. Soc., 119, 3500-3506. 

A ferrimagnetic chain of Dy2Cu2 tetramers was obtained by the ingenious use of Dy(hfac)3 and [Cu(dmg)(Hdmg)] as tectons (H2dmg = dimethylglyoxime)... 

Figure 6.68 Schematic illustration of spin assembly metal-based ferrimagnetic chains. Reprinted, by permission, from J. V. Yakhmi, Physica B, 321, 206. Copyright 2002 by Elsevier Science B. V.

This strategy consists in building ferrimagnetic chains and assemble them in a ferromagnetic arrangement, taking advantage of interchain interactions. 

An alternative approach to the formation of ferrimagnetic chains has been to combine transition ions and stable organic radicals in an alternating manner. One such example is the compound Mn(hfac)2(NIT)Tr, where hfac = hexafluoroacetylacetonate and (NIT)Tr is the nitronyl... 

In this section on the heterospin system, we will discuss three subjects 1) the magnetic coupling between the metal ion and organic spins through pyridine chromophores, 2) the photochemical formation of ferri- and ferrimagnetic chain (ID), and 3) the attempt to create frozen solution magnets (a carbene-based magnet). 

Fig. 3.9 Upper Antiferromagnetic coupling of two spins intermediated by a diamagnetic bridge (through-bond interactions). Middle After linking the units, a one-dimensional ferrimagnetic chain is obtained. Lower The ID chains are linked together through weaker intramolecular (through-space) interactions, indicated by dotted lines (for simplicity only two dimensions are shown)...

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