Metal Dilution Effects on the Reverse Spin Transition in Mixed Crystals of Type [Co_1–<i>x</i>Zn_<i>x</i>(C₁₆-terpy)₂](BF₄)₂ (<i>x</i> = 0.1–0.7)

Abstract

Metal dilution effects on reverse spin transition (rST) in mixed crystals of type [Co(1-x)Zn(x)(C16-terpy)2](BF4)2 (x = 0.1-0.7) were investigated by comparison with behavior of [Co(1-x)Fe(x)(C16-terpy)2](BF4)2 (x = 0.1-0.4). In the mixed crystals, the Zn complexes increased rST temperatures linearly with increasing values of x, without changing the hysteresis width, while the Fe complexes decreased rST temperatures. Moreover, the strength of the metal dilution effects in the CoZn mixed crystals is weaker than what occurs in the CoFe mixed crystals.