Thermodynamic properties of the new multiferroic material (NH${}_4$)${}_2$[FeCl${}_5$(H${}_2$O)]

M. Ackermann, D. Brüning, T. Lorenz +2

(NH${}_4$)${}_2$[FeCl${}_5$(H${}_2$O)], a member of the family of antiferromagnetic $A_2$[Fe$X_5$(H${}_2$O)] compounds ($X$ = halide ion, $A$ = alkali metal or ammonium ion) is classified as…