Title of article :
Structural, magnetic and Mِssbauer studies of the molecular ferromagnet compounds NBu4[MCr(C2O4)3] (Bu=(CH2)3CH3, M=Mn, Fe)
Author/Authors :
Yu.A and Atovmyan، نويسنده , , L.O. and Shilov، نويسنده , , G.V. and Ovanesyan، نويسنده , , N.S. and Pyalling، نويسنده , , A.A. and Lyubovskaya، نويسنده , , R.N. and Zhilyaeva، نويسنده , , E.I. and Morozov، نويسنده , , Yu.G.، نويسنده ,
Abstract :
An X-ray study of a single crystal of the NBu4[MnCr(C2O4)3 composition reveals a layered structure with an ordered arrangement of Mn2+ and Cr3+ ions. According to the data of the orientation dependence of magnetization at 4.5K, the magnetic easy axis is aligned along the crystal c-axis. Mِssbauer data analysis of isostructural NBu4[FeCr(C2O4)3] powder material gives, on the contrary, the evidence of strong confinement of Fe2+ spins to the crystal basal plane. The ferromagnetic system which arises here is a quasi-2D system in terms of the nature of its exchange interactions.
