Correlation of magnetic and optical properties in the organic-intercalated two-dimensional ionic ferromagnet bis(monomethylammonium) tetrachlorochromate(II)
Abstract
A simple correlation exists between the intensity of a quintet-to-triplet transition in the visible absorption spectrum of (MeNH3)2CrCl4(Tc 58 K) and the magnetic order; from 6 to 50 K the oscillator strength of the optical transition is proportional to T2 and from 70 to 125 K it is nearly constant.