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A simple Co(II) mononuclear complex [Co(PPh3)2(NCS)2] has been studied in details. Its crystal and molecular structure is reported along with its IR a UV–Vis spectra. The DC magnetization studies confirm a sizable zero-field splitting D/hc=−9.4cm−1 that is also confirmed by quantum-chemical calculations. The AC susceptibility data shows that there is a slow magnetic relaxation with two relaxation...
Mononuclear Co(II) complex [Co(Me6tren)Cl]ClO4 has been investigated in terms of the AC susceptibility studies at various frequencies, temperatures, and external magnetic fields. In addition to the slow magnetic relaxation present even in an absence of the external field, the application of the BDC=0.2, 0.4, and 0.8T induces a second, slower relaxation path. The effective barrier to spin reversal...
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