Pressure induced changes of magnetic phase transitions in RCo4B compounds

Abstract The magnetovolume and magnetic properties of RCo 4 B (R—Y, Ce, Gd) compounds under pressure up to 12 kbar have been studied. We determined the volume dependencies of Curie temperatures, magnetization, spin reorientation transitions (for YCo 4 B), first-order magnetization process (for monocrystalline GdCo 4 B) and also the pressure induced changes of the volume anomaly connected with the isostructural phase transition of CeCo 4 B. The results have been used to analyze the influence of rare-earth atoms on the volume dependencies of exchange interactions and magnetic anisotropy of RCo 4 B compounds.