Abstract
Using DC and AC magnetometry, the pressure dependence of the magnetization of the threedimensional
antiferromagnetic coordination polymer Mn(N(CN)2)2 was studied up to 12 kbar and
down to 8 K. The magnetic transition temperature, Tc, increases dramatically with applied pressure
(P), where a change from Tc(P = ambient) = 16:0 K to Tc(P = 12:1 kbar) = 23:5 K was
observed. In addition, a marked difference in the magnetic behavior is observed above and below
7.1 kbar. Specifically, for P < 7:1 kbar, the differences between the field-cooled and zero-field-cooled
(fc-zfc) magnetizations, the coercive field, and the remanent magnetization decrease with increasing
pressure. However, for P > 7:1 kbar, the behavior is inverted. Additionally, for P > 8:6 kbar, minor
hysteresis loops are observed. All of these effects are evidence of the increase of the superexchange
interaction and the appearance of an enhanced exchange anisotropy with applied pressure.
