Ferromagnetism in YbCu2Si2 at high pressure

TL;DR

This study reveals that YbCu2Si2 likely exhibits ferromagnetic order at high pressure, with transition temperature increasing under pressure and magnetic field, suggesting a broader trend in ytterbium systems towards ferromagnetism.

Contribution

It provides detailed experimental evidence of pressure-induced ferromagnetism in YbCu2Si2 and discusses its implications for ytterbium-based materials.

Findings

YbCu2Si2 orders ferromagnetically at high pressure

Transition temperature increases with pressure and magnetic field

Ytterbium systems may generally trend towards ferromagnetism

Abstract

We demonstrate from detailed ac-susceptibility and calorimetry studies under hydrostatic pressure that YbCu2Si2 probably orders ferromagnetically at high pressure. The (p,H,T) phase diagram, shows that the transition temperature increases with pressure, but also with an applied magnetic field. We suggest that many ytterbium systems may show a trend towards ferromagnetism and we discuss the possible reasons for this. We also examine the implications, including the potential of YbCu2Si2 and other Yb compounds for further studies of the rich physical properties that may occur near a ferromagnetic critical point.