Magnetic properties of YCo$_5$ compound at high pressure

TL;DR

This study investigates how high pressure affects the crystal structure and magnetic properties of YCo$_5$, combining neutron diffraction experiments with advanced theoretical calculations to understand its electronic behavior.

Contribution

It provides a combined experimental and theoretical analysis revealing the pressure-induced magnetic and structural changes in YCo$_5$ using neutron diffraction and DFT+DMFT methods.

Findings

Good agreement between experimental and calculated cobalt moments.

Pressure induces a Lifshitz transition in YCo$_5$.

Strong local electron-electron interactions influence magnetic behavior.

Abstract

The crystal structure and magnetic properties of YCo$_5$ compound have been studied by neutron diffraction, in the pressure range $0 \le p \le 7.2 \ GPa$. 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.