Influence of high pressure on the remarkable itinerant electron behavior in Y0.7Er0.3Fe2D4.2 compound

Monoclinic Y$_{0.7}$Er$_{0.3}$Fe$_2$D$_{4.2}$ compound exhibits unusual magnetic properties with different field induced transitions. The deuteride is ferrimagnetic at low temperature and the Er Fe sublattices present transitions temperatures. moments are ordered below T$_{Er}$=55 K, whereas remain ferromagnetically coupled up to T$_{M0}$ = 66 K. At display a sharp ferromagnetic-antiferromagnetic transition (FM-AFM) through an itinerant electron metamagnetic (IEM) behaviour very sensitive any volume change. becomes paramagnetic above T$_N$=125 pressure dependence of T$_{Er}$ have been extracted from measurements under hydrostatic 0.49 GPa. Both temperatures decrease linearly upon applied dT$_{Er}$/dP=-126 dTM0/dP=-140 K.GPa$^{-1}$ for B=0.03 T. ferromagnetic order disappear P=0.44(4) However, larger B=5 T, dT$_{M0}$/dP=-156 dT$_{Er}$/dP=-134 showing weaker sensitivity field. 2 K saturation magnetization can be attributed reduction mean moment due canting and/or crystal effect. Above curves AFM FM state, which also pressure. B$_{trans}$, increases heating, shifted lower dT=-17 between 0 0.11 These results show strong decoupling versus temperature,