Magnetic properties of YCo${}_5$ compound at high pressure

The crystal structure and magnetic properties of YCo${}_5$ compound have been studied by neutron diffraction, in the pressure range $0\le p\le 7.2GPa$. The experimental data are analyzed together with results from the combined Density Functional and Dynamical Mean-Field Theory. A good agreement between the experimentally determined and calculated values of cobalt moments is shown. Our scenario for the behavior of YCo${}_5$ under pressure, is the combined action of the Lifshitz transition with a strong local electron-electron interaction.