Paramagnetic Resonance in Copper Propionate Monohydrate

概要

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Paramagnetic resonance absorption was investigated at centimeter wavelength region in single crystals of copper propionate monohydrate Cu(CH_3CH_2COO)_2・H_2O. The spectrum obtained is not a normal one expected for a ^2<D> state of Cu^<++> ions in crystals but similar to that observed in copper acetate monohydrate Cu(CH_3COO)_2・H_2O and more complicated. This spectrum can be explained by an effective spin Hamiltonian with an equivalent spin value S = 1. This may lead us to a conclusion that each of the magnetic complexes in this crystal consists of a pair of copper ions ' under a strong interaction and may be created from a bimolecular structure, Cu_2(CH_3CH_2COO)_4・2H_2O as in the case of the acetate. The unit cell of this crystal contains six spatially inequivalent pairs, of which three can be derived from the others by a reflection in its ac-plane. Each pair of ions in this crystal is considered to be under a very similar environment, except the direction of the pairs. The rhombicity in its crystalline field is smaller than that of the acetate.
社団法人日本物理学会の論文
1958-09-05