(C6H5CH2NH3)2CrBr3.3I0.7: A new insulating ferromagnet with a Curie temperature of 51 K
Abstract
A mixed-halide bis(benzylammonium)tetrahalogenochromate(II), (C6H5CH2NH3)2CrBr3.3I0.7, has been synthesized and characterized. The compound crystallizes in the layered K2NiF4 perovskite structure. It orders ferromagnetically at Tc= 51 K, one of the highest critical (Curie) temperatures shown by magnetic insulators. A hystersis loop typical of a soft ferromagnet has been obtained. At T= 6 K, the remnant magnetization is 4.2 × 103 cm3 mol–1 G and the coercive field is 130 G.