Magnetism in EuAlSi and the Eu1-xSrxAlSi Solid Solution

TL;DR

This paper investigates the magnetic properties of EuAlSi and its solid solution Eu1-xSrxAlSi, revealing a potential quantum critical point where ferromagnetism is suppressed and superconductivity emerges.

Contribution

It introduces the Eu1-xSrxAlSi solid solution and explores its magnetic and quantum phase transition behaviors.

Findings

EuAlSi exhibits ferromagnetic order on a honeycomb and triangular lattice.

Suppression of ferromagnetism near x=0.96 correlates with the onset of superconductivity.

A possible quantum critical point exists around x=0.96 in the solid solution.

Abstract

The magnetic properties of EuAlSi, a compound comprising a honeycomb lattice of Al and Si atoms and a triangular lattice of Eu atoms, are presented. Moreover, we have prepared the Eu1-xSrxAlSi solid solution, to study the evolution of the collective quantum properties from the ferromagnetic EuAlSi towards the superconducting SrAlSi. A possible quantum critical point is suggested to exist in the vicinity of to x of 0.96, at which the suppression of ferromagnetic order is concomitant with the emergence of superconductivity.