Magnetic susceptibility of Ce: an LDA+DMFT study

TL;DR

This study uses LDA+DMFT calculations to analyze the magnetic susceptibility of cerium in its alpha and gamma phases, revealing similar temperature-dependent behaviors and explaining phase differences through hybridization effects.

Contribution

It provides a detailed theoretical analysis of cerium's magnetic susceptibility in different phases using LDA+DMFT, highlighting the role of hybridization in phase-dependent magnetic properties.

Findings

Magnetic susceptibility follows Curie-Weiss law at high temperatures.

Susceptibility exhibits a maximum in a crossover regime.

Differences between phases are due to hybridization-induced shifts in susceptibility.

Abstract

The magnetic properties of Ce in the $\alpha$ and $\gamma$ phase are calculated within the LDA+DMFT approach. The magnetic susceptibility in these two phases shows a similar behavior over a wide temperature range: a Curie-Weiss law at high temperatures, indicating the presence of local moments, followed by a maximum in a crossover regime, and a saturation characteristic of a state with screened local moments at low temperature. The difference in experimentally observable magnetic properties is caused by the shift of the susceptibility to higher temperatures in the $\alpha-$phase compared to the $\gamma-$phase, due to the larger hybridization between localized $4f-$states and conductive $spd-$electrons.