Calorimetric Investigation of CeRu2Ge2 up to 8 GPa

TL;DR

This study introduces a high-pressure ac-calorimeter to measure the specific heat of CeRu2Ge2 up to 8 GPa, revealing its magnetic phase diagram consistent with prior transport data.

Contribution

A novel calorimetric technique adapted for high-pressure conditions enabling specific heat measurements up to 10 GPa.

Findings

Successful measurement of CeRu2Ge2's specific heat under high pressure.

Magnetic phase diagram aligns with previous transport measurements.

Abstract

We have developed a calorimeter able to give a qualitative picture of the specific heat of a sample under high pressure up to approximately 10 GPa. The principle of ac-calorimetry was adapted to the conditions in a high pressure clamp. The performance of this technique was successfully tested with the measurement of the specific heat of CeRu2Ge2 in the temperature range 1.5 K<T<12 K. The phase diagram of its magnetic phases is consistent with previous transport measurements.