Pressure-Dependent Increase in Tc and Magnetic Behavior of [Ru2(O2CBut)4]3[M(CN)6]·2H2O (M = Cr, Fe)

Magnetization as a function of applied pressure up to 10.16 kbar and magnetic field were obtained for layered [Ru2(O2CBut)4]3[M(CN)6]·2H2O (M = Cr, Fe). For M = Fe, the Tc increased by 13% from 6.1 to 6.9 K with a significant increase in the coercive field, Hcr, from 5 to 65 Oe, followed by a sharp decrease to less than 10 Oe at further applied pressure. A 32% increase in Tc from 37.8 to 50.0 K was observed for M = Cr as well as a linear decrease of Hcr upon increasing pressure from 6380 to 2380 Oe.