Temperature dependent magnetic susceptibility

The electrocrystallization and characterization of a novel molecular metal which displays both electronic and ionic conduction has been reported. The complex Li0.6(15-crown-5-ether)[Ni-(dmit)2] H20 is composed of stacks of [Ni(dmit)2] units which provide pathways for electronic conduction. The stacks are separated by parallel stacks of 15-crown-5-ether moieties in a channellike formation which facilitates ion conduction. The salt has a room temperature conductivity of 240 Scm-1. Temperature-dependent magnetic susceptibility and NMR measurements were used to prove the existence of Li+ movement within the crown ether channels.1030... 

Temperature-Dependent Magnetic Susceptibility and Field-Dependent Magnetization... 

Magnetic Susceptibility and EPR Data. The temperature dependent magnetic susceptibility and EPR of the S -ethylporphyrazines were measured and the effective magnetic moments ([teff), spin, and J values are reported in Table XIV (113, 116). 

The effect of intraligand substitution on the spin crossover behaviour in these systems has been further investigated using various techniques188). Variable temperature Mossbauer spectra show the quadrupole doublets of the two coexisting spin states. Thermodynamic parameters have been derived from the temperature dependent magnetic susceptibility data. AH has been found to be 4.8,3.1, and 4.8 kcal mol-1 for II, III, and IV, serially, in the solid state, and 4.6 and 2.8 kcal mol-1 for II and III, respectively, in solution. 

For compounds 4-6 where copper (II) ions are bridged by O-P-O groups into a layer, very interesting metamagnetic behaviors are observed. Figure 7 shows the temperature dependent magnetic susceptibilities of compound 4 at 20 kOe, which is characteristic of a ferrimagnetic behavior. The Xm vs T curves measured at 20 kOe, 180 Oe and 30 Oe show a... 

Figure 21 shows temperature dependence of electrical conductivity and magnetic susceptibility of MEM(Af-methyl-iV-ethyl-morpholinium)-(TCNQ)2 [70]. At about 335 K it undergoes a metal-insulator transition accompanied by the onset of a two-fold superstructure and a temperature dependent magnetic susceptibility characteristic of localized moments. It is considered as depicted in Fig. 22(a) that a dimerized TCNQ accepts an electron localized by, for example, the Mott transition or the Wigner crystallization. The solid curve shown in Fig. 21(b) denotes the theoretical prediction for the magnetic susceptibility of a one-... 

Figure 7. Calculated and experimental temperature-dependent magnetic susceptibilities for [Fe(sar)]2+ cation in acetonitrile [243].

The temperature-dependent magnetic susceptibility study of the homobinuclear [M2(trom)](BF4) complexes indicated that the magnetic moment decreases substantially with decrease in the temperature. The intramolecular antiferromagnetic exchange between the metal centres was also observed. This interaction occurs... 

The Van Vleck equation then expresses the temperature-dependent magnetic susceptibility as a function of the various E as ... 

To assess the reliability of the MO results further the energy terms Ea corresponding to curve b in Fig. 28a are taken to compute temperature-dependent magnetic susceptibilities %(T). The -tensor %vq with j), q—x,y, z is defined by... 

Qualitatively, the temperature-dependent magnetic susceptibility x(T) for each member of the series has same the general shape as the plots in Figure 7, falling almost linearly with decreasing temperature above the metal-... 

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