Tuning anisotropy by impurities: magnetocaloric experiments on CsNi0.9Fe0.1Cl3

Abstract: The magnetic phase diagram of the Fe2+ doped hexagonal ABX3 compound CsNi0.9Fe0.1Cl3 is investigated by heat capacity and magnetocaloric experiments. In spite of the high doping concentration, some phase boundaries appear surprisingly well-defined, while others are broadened significantly. The discussion of this behaviour clarifies the potentials and limitations of doping as a means to manipulate the effective anisotropy in quasi one-dimensional ABX3 compounds.