Mössbauer Investigation of the Ferromagnetic Coupling in Copper-Iron Polycyanides

Mössbauer investigation of the thermal phase transition in RbMnFe(CN)6

“…Thus a doublet is observed. The values of the hyperfine Table 2 Mössbauer parameters of RbMnFe(CN) 6 parameters are consistent with those reported in the literature [2,[30][31][32]. The strong covalency of the bond between iron and its surrounding strong CN ligands cause the IS to be less negative.…”

“…The singlet corresponds to low-spin Fe II (S = 0) ions, because octahedral Fe(II) complex is in a spin-paired strong-field configuration, which makes the 3d electron charge distribution spherosymmetrical [29,30]. The 3d charge electrons give no QS.…”

Ferromagnetic order and spin-glass behavior in multi-metallic compound Ni1.125Co0.375[Fe(CN)6]·6.8H2O

“…The observed spectra can be fitted two components having chemical shifts (CS) of À0.176 mm/s and 0.187 mm/s and quadrupole splitting (QS) of 0.432 mm/s and 0.491 mm/s, respectively. The component (the bigger green lines) with CS = À0.176 mm/s and QS = 0.432 mm/s which relatives intensities is 96% may be identified as low spin Fe 3+ (S = 1/ 2) [7,17]. The second doublet (the smaller blue lines) with CS = 0.187 mm/s and QS = 0.491 mm/s which relative intensities is 4% may be identified as high spin Fe 3+ (S = 5/2) [7].…”