Field induced suppression of charge density wave in GdNiC$_2$

TL;DR

This study investigates how magnetic fields influence the charge density wave in GdNiC₂, revealing that field-induced magnetic transitions can suppress the CDW state through magnetoresistance and Hall effect measurements.

Contribution

It provides new insights into the magnetic field effects on charge density waves in GdNiC₂, demonstrating field-induced suppression of the CDW state.

Findings

Large negative magnetoresistance above T_N due to Zeeman splitting.

Magnetic field induces a transition from antiferromagnetic to metamagnetic phase.

Partial suppression of the charge density wave by magnetic field.

Abstract

We report the specific heat, magnetic, magnetotransport and galvanomagnetic properties of polycrystalline GdNiC$_2$. In the intermediate temperature region above $T_N$ = 20 K, we observe large negative magnetoresistance due to Zeeman splitting of the electronic bands and partial destruction of a charge density wave ground state. Our magnetoresistance and Hall measurements show that at low temperatures a magnetic field induced transformation from antiferromagnetic order to a metamagnetic phase results in the partial suppression of the CDW.