Pressure effect on magnetic properties of GdCo_2Fe_2B

摘要

The experimental study of the pressure effect on magnetization MS and compensation temperature TComp of ferrimagnetic GdCo_2Fe_2B in a magnetic field up to 7 T under hydrostatic pressures up to 10 kbar is presented. Due to the mutual antiparallel arrangement of Gd and 3d sublattices and the negligible pressure effect on localized Gd magnetic moment, the observed increase of Ms with pressure (dMs(5K)/dp=+0.007μBkbar~(-1)) can be attributed to the pressure induced decrease of 3d magnetic moments, predominately to the decrease of Fe moment, dm_(Fe)/dp=-2.8.10-3μB/ at.kbar. The pressure induced increase of Ms is also responsible for the remarkable increase of TComp under pressure (dT_(Comp)/dp=+0.90K/kbar). This opens the field to tunablibilty of the T_(Comp).