Low magnetic moment and unconventional magneto-transport in half-Heusler alloy CoVGe

TL;DR

This study reports the synthesis and characterization of the half-Heusler alloy CoVGe, revealing its low magnetic moment, half-metallic transport properties, and unconventional magnetoresistance, supported by theoretical calculations.

Contribution

First experimental realization of CoVGe with detailed structural, magnetic, and transport analysis supported by theoretical insights.

Findings

CoVGe exhibits a very low magnetic moment of 0.13 μB at 5 K.

Electrical resistivity indicates half-metallic behavior.

Magnetoresistance is positive, non-saturating, and linear at low temperatures.

Abstract

In the present work, we experimentally realize CoVGe for the first time and investigate its structural, magnetic, and transport properties, supported by theoretical calculations. The material crystallizes in a cubic structure and exhibits a very low magnetic moment of 0.13 {\mu}B per formula unit at 5 K. The temperature dependence of electrical resistivity suggests half-metallic behaviour. Magnetoresistance shows a positive, non-saturating linear field dependence at low temperature that gradually weakens with increasing temperature. The combination of low magnetic moment and unusual magnetotransport behaviour positions CoVGe as a promising platform for exploring spin-dependent transport in Heusler-based materials.