Low-temperature nuclear and magnetic structures of La2O2Se2.Fe2O from X-ray and neutron diffraction measurements

TL;DR

This study investigates the low-temperature nuclear and magnetic structures of La2O2Se2.Fe2O using X-ray and neutron diffraction, revealing antiferromagnetic order at around 90 K with a specific propagation vector.

Contribution

It provides detailed analysis of the magnetic ordering in La2O2Se2.Fe2O at low temperatures using combined diffraction techniques, highlighting its antiferromagnetic structure.

Findings

Antiferromagnetic order established below 90 K

Magnetic structure similar to FeTe

No symmetry lowering in nuclear structure

Abstract

This paper describes the low temperature nuclear and magnetic structures of La2O2Se2.Fe2O by analysis of X-ray and neutron diffraction data. The material has been demonstrated to order antiferromagnetically at low temperatures, with TN \approx 90 K a propagation vector of k = (1/2 0 1/2), resulting in a spin arrangement similar to that in FeTe, despite there being no apparent lowering in symmetry of the nuclear structure.