Author/Authors :
Ishida، نويسنده , , Takayuki and Mitsubori، نويسنده , , Shin-ichi and Nogami، نويسنده , , Takashi and Ishikawa، نويسنده , , Yoshimitsu and Yasui، نويسنده , , Masanori and Iwasaki، نويسنده , , Fujiko and Iwamura، نويسنده , , Hiizu and Takeda، نويسنده , , Naoya and Ishikawa، نويسنده , , Masayasu، نويسنده ,
Abstract :
The 12 spins of oxovanadium(IV) ions were ferromagnetically coupled with JkB = +1.1∼+2.7 K in the dinuclear complexes L[VO(hfac)2]2 (hfac = hexafluoroacetylacetonate, L = pyrimidine derivatives). Among them, a ferromagnetic transition was observed at about 0.14 K in PM[VO(hfac)2]2 (PM = pyrimidine). The polymeric complex QZ[Cu(hfac)2] (QZ = quinazoline) gave a positive Weiss constant (+0.39 K). The ferromagnetic transition was observed at about 0.12 K.
