constant x [10.sup.-4] [cm.sup.-1] Complex [A.sub.[perpen- [A.sub.[parallel]] dicular to]] [Cr(MFMAQ)[Cl.sub.2]] -- -- [Cu(MFMAQ)Cl([H.sub.2]O)] 163 47 Hyperfine
constant x [10.sup.-4] [cm.sup.-1] Complex [A.sub.iso] g.sub.[parallel]] [Cr(MFMAQ)[Cl.sub.2]] 84 -- [Cu(MFMAQ)Cl([H.sub.2]O)] 106 2.34 Hyperfine
constant x [10.sup.-4] [cm.sup.-1] Complex [g.sub.[perpen- dicular to]] [g.sub.iso] [Cr(MFMAQ)[Cl.sub.2]] -- 1.97 [Cu(MFMAQ)Cl([H.sub.2]O)] 2.04 2.11 Table 6: Crystallographic data for the Schiff base complexes [Cr(MFMAQ)[Cl.sub.2]], [Co(MFMAQ)Cl([H.sub.2]O)], and [Cu(MFMAQ)Cl([H.sub.2]O)].
They can be distinguished by hyperfine
parameters, namely, isomer shift and quadrupole splitting.
Figure 3 presents the Mossbauer spectra measured with and without an external field and the corresponding hyperfine
magnetic field (HFF) distributions p([B.sub.hf]) (blue and black lines).
Although Mn(II) hyperfine
lines in EPR spectrum and Mn(II) peak in XRD pattern were observed, no Mn(II) peak was seen in EDS pattern.
Thus, thanks to superlattices, the physicists-experimenters have a real possibility of rapidly changing the nature of the magnetic ordering of their hyperfine
layers [10, 14], And, finally, they have a real way to control the change within the noticeable limits of the electrical resistance [R.sub.e] of the conductive <<puff>>.
The nuclear hyperfine
field, quadrupole splitting, and isomer shift provide very precise information about the electronic and magnetic state of the nuclei, chemical bonds, structure of the local environment, and so on [1, 2].
And because the thickness of the ionization layer of the corona discharge is ignored, the hyperfine
spatial resolution of the computational grids is not a necessity when simulating the ions drift in the diffusion area of a corona discharge in a large space domain.
Quantitative analysis of the recorded spectra was conducted on basis of the stochastic relaxation model developed by Blume and Tjon , in which the magnetic hyperfine
field [B.sub.hf] fluctuates randomly between two directions (+[B.sub.hf] and -[B.sub.hf]) along the symmetry axis of an axially symmetric electric field gradient tensor.
Multilined EPR spectra are generated as a consequence of the interaction between the magnetic spin of the unpaired electron and the nuclear spin of a neighbouring nucleus within the spin trap; this is called hyperfine
splitting (Figure 1(b)) [59, 60].
Due to the presence of the nuclear magnetic moment I = 5/2 for [sup.55]Mn, the hyperfine
interaction between the electron (S = 5/2) and nuclear spins leads to the observation of the sixth-line pattern centered at g-factor of g [approximately equal to] 2.001(1) and hyperfine
constant A of about (9-10) mT.
Millman and Kusch (who, like Rabi, would become a Nobel Laureate in 1955), had first measured the cesium resonance frequency at Columbia in 1940, estimating the frequency of the hyperfine
transition as 9191.4 megacycles.