Low Temperature Neutron Diffraction Study of MnTe

TL;DR

This study uses low temperature neutron diffraction to explore the magnetic and transport anomalies in MnTe, revealing that increased ferromagnetic interactions within planes cause susceptibility rises at low temperatures.

Contribution

It provides new insights into the magnetic interactions in MnTe at low temperatures using neutron diffraction, linking susceptibility anomalies to ferromagnetic strengthening.

Findings

Susceptibility rises at around 83K due to ferromagnetic interaction strengthening.

Negative resistance coefficient observed below 100K.

Neutron diffraction confirms in-plane ferromagnetic interactions increase at low temperatures.

Abstract

Investigation of transport and magnetic properties of MnTe at low temperatures sInvestigation of transport and magnetic properties of MnTe at low temperatures showed anomalies like negative coefficient of resistance below 100K and a sharp rise in susceptibility at around 83K similar to a ferromagnetic transition. Low temperature powder neutron diffraction experiments were therefore carried out to understand the underlying phenomena responsible for such anomalous behavior. Our study indicates that the rise in susceptibility at low temperatures is due to strengthening of ferromagnetic interaction within the plane over the inter plane antiferromagnetic interactions.