Transport and Magnetic properties of Fe1/3VSe2

TL;DR

This study investigates the electrical, thermoelectric, and magnetic properties of Fe-intercalated VSe2, revealing a first-order resistivity transition, sensitivity to structural details, and absence of magnetic order down to low temperatures.

Contribution

It provides new insights into the transport and magnetic behavior of Fe0.33VSe2, highlighting the impact of structural variations and contrasting its magnetic properties with related compounds.

Findings

Resistivity shows a first-order transition around 160K.

Magnetic measurements indicate no magnetic order down to low temperatures.

Magnetic moments per Fe atom are lower than in similar compounds.

Abstract

Electrical conductivity, thermopower and magnetic properties of Fe-intercalated Fe0.33VSe2 has been reported between 4.2K - 300K. We observe a first order transition in the resistivity of the sintered pellets around 160K on cooling. The electronic properties including the transitional hysteresis in the resistance anomaly (from 80K-160K) are found to be very sensitive to the structural details of the samples, which were prepared in different annealing conditions. The thermopower results on the sintered pellets are reported between 10K - 300K. The magnetic measurements between 2K - 300K and up to 14 Tesla field show the absence of any magnetic ordering in Fe0.33VSe2. The magnetic moment per Fe -atom at room temperature (between 1.4 to 1.7 Bohr Magneton) is much lower than in previously reported anti-ferromagnetic FeV2Se4. Furthermore, the Curie constant shows a rapid and continuous reduction and combined with the high field magnetization result at 2K suggests a rapid decrease in the paramagnetic moments on cooling to low temperatures and the absence of any magnetic order in Fe0.33VSe2 at low temperatures.