Thermal Expansion and Magnetostriction of the Ising Antiferromagnet TbNi2Ge2

TL;DR

This study investigates the thermal expansion and magnetostriction of TbNi2Ge2, revealing its magnetic phase diagram, uniaxial pressure effects, and a potential new high-field phase near 10 T.

Contribution

It provides detailed measurements of thermal and magnetic responses of TbNi2Ge2, identifying a possible new field-induced phase not previously reported.

Findings

Magnetic phase diagram consistent with earlier studies

Estimated uniaxial pressure dependence of magnetic properties

Detected a new high-field feature near 10 T suggesting an additional phase

Abstract

We have measured the linear thermal expansion and magnetostriction of the Ising antiferromagnet TbNi2Ge2 along its c-axis from room temperature to 2 K and in magnetic fields to 14 T. We find a magnetic phase diagram that agrees with earlier work and estimate aspects of its uniaxial pressure dependence. We also find a new high field feature near 10 T which may signal the onset of an additional field-induced phase.