Angular dependence of the magnetic susceptibility in the itinerant metamagnet Sr3Ru2O7

TL;DR

This study investigates how the magnetic susceptibility of Sr3Ru2O7 varies with temperature and magnetic field angle, revealing that the field angle tunes the critical end-point of metamagnetic phase transitions.

Contribution

It demonstrates that the magnetic field angle acts as a continuous tuning parameter for the critical end-point in Sr3Ru2O7, providing new insights into its metamagnetic behavior.

Findings

Critical end-point at ~1.25K for in-plane fields

End-point depressed below 50mK near c-axis fields

Field angle influences the metamagnetic phase transition

Abstract

We report the results of a study of the di erential magnetic susceptibility of Sr3Ru2O7 as a function of temperature and magnetic elds applied at a series of angles to the ab plane. By analysing the real and imaginary parts of the susceptibility, we conclude that the eld angle acts as a continuous tuning parameter for the critical end-point to a line of rst order metamagnetic phase transitions. The end-point sits at approximately 1.25K for elds applied in the ab plane, and is depressed to below 50 mK when the eld is aligned within 10 of the c axis.