Slow Relaxation of Magnetic Susceptibility in Polycrystalline GdBaCo2O5.53 above the Curie Point and the Effect of High Hydrostatic Pressures

详细

A slowly decaying anomaly of magnetic susceptibility (characteristic time τ ~ 10³ s) is revealed in studying the ferromagnetic–paramagnetic phase transition in polycrystalline cobaltite GdBaCo₂O_5.53 that occurs due to the remaining short-range magnetic order at temperatures above the Curie point (T_C = 275 K). High hydrostatic pressures (up to 1.48 GPa) are found to have a weak effect on T_C with baric coefficient dT_C/dP = 2.1 K/GPa.