π-dorbital hybridization in the metallic state of organic-inorganic complexes seen by13Cand<

Ferromagnetic and Antiferromagnetic Fluctuations ofπ−dItinerant Electrons Disclosed by Band-Selective NMR

“…The nucleus feels hyperfine fields made by the electrons on different orbitals through the orbital-dependent hyperfine coupling constants, which are defined by the ratio of the hyperfine field at the nuclear site to the electron spin moment on each orbital. This electron moment-hyperfine field correspondence gives the NMR utility of the orbital attribution of the magnetism, as was recently utilized for the organics [1] and the oxides [2] to yield the orbitaldependent magnetism. In the present Letter, we show that NMR can acquire the higher level of utility that is probing the constituent electronic bands separately.…”

“…In this case, the hyperfine coupling constant has only an isotropic term, i a d , for every site of i. The values of i a p , i B p , and i a d were obtained in our previous work [1,8]. Because the p and d orbitals are hybridized to form the two different bands, the local field at site i is made by the 1D p band spin and the 3D p-d band spin.…”

N,N‘-Dicyanoquinone Diimines (DCNQIs): Versatile Acceptors for Organic Conductors

“…By NMR spectroscopy of the counterions 7 Li +240 , Tl + , 40-242 and 63 Cu + , − metal-like Knight shifts were observed in DMe-DCNQI radical salts. Corresponding shifts were found in the anionic ligands for 13 C ,,,− and 15 N, ,− where increasing relaxation times below M→I transitions point to charge ordering. Similarly, 1 H NMR spectra have been analyzed according to relaxation rates. ,, By employing ESR spectroscopy, insight has been gained about charge densities and mobilities together with dynamic susceptibilities in DCNQI type radical metal salts.…”

“…By NMR spectroscopy of the counterions 7 Li +240 , 205 Tl + , and 63 Cu + , [240][241][242][243][244][245] metal-like Knight shifts were observed in DMe-DCNQI radical salts. Corresponding shifts were found in the anionic ligands for 13 C 151,152,212,246-253 and 15 N, 212,[250][251][252] where increasing relaxation times below MfI transitions point to charge ordering. Similarly, 1 H NMR spectra have been analyzed according to relaxation rates.…”