La$_{ 1.5}$Ca$_{ 0.5}$CoIrO$_{ 6}$ is a re-entrant spin-glass (SG) that exhibits antiferromagnetic and ferromagnetic couplings at $T\sim95$ and $\sim86$ K, respectively, and at $T\sim25$ K a SG phase emerges. In this work we investigated the effect of hydrostatic pressure ($P$) on La$_{ 1.5}$Ca$_{ 0.5}$CoIrO$_{ 6}$ magnetic properties. By means of magnetization as a function of temperature measurements, carried under different applied pressures and/or magnetic fields, we have found that the freezing temperature of the SG phase exhibits an initial increase followed by a decrease with increasing $P$, and that the maximum $P$ = 7.9 kbar was not sufficient to prevent the formation of the frozen state. Since the ordering temperatures of the antiferromagnetic and ferromagnetic phases are also affected by $P$, we discuss the results here found in terms of changes on the balance between the magnetic phases.
Categories: cond-mat.mtrl-sci