Magnetic studies of the layered compounds (CH2)n(NH3)2FeCl4, n = 2, 3 and 6

Abstract The magnetic susceptibility as a function of temperature and field strength of the series of compounds (CH 2 ) n (NH 3 ) 2 FeCl 4 , n = 2, 3 and 6 have been investigated. The three compounds undergo magnetic transitions at T N ( H = 0) = 105.0±1, 94.5+0.5 and 98.0+0.5 K . From the susceptibility and DTA measurements no evidence for structural phase changes is found in the investigated temperature range. The results are interpreted in terms of a canted antiferromagnetic arrangement. With increasing n the interlayer spacing increases and the magnetic structure becomes more and more two dimensional.