Crystal and magnetic structure of La_{1-x}Sr_{1+x}MnO_{4} : role of the orbital degree of freedom

TL;DR

This study investigates how the crystal and magnetic structures of La_{1-x}Sr_{1+x}MnO_4 evolve with temperature and doping, highlighting orbital rearrangements without structural phase transitions.

Contribution

It provides detailed insights into the orbital effects on structure and magnetism in La_{1-x}Sr_{1+x}MnO_4, using diffraction and dilatometry techniques.

Findings

No structural phase transition observed.

Structural changes linked to orbital rearrangement.

Doping and temperature significantly affect structure and magnetism.

Abstract

The crystal and magnetic structure of La_{1-x}Sr_{1+x}MnO_4 (0<x<0.7) has been studied by diffraction techniques and high resolution capacitance dilatometry. There is no evidence for a structural phase transition like those found in isostructural cuprates or nickelates, but there are significant structural changes induced by the variation of temperature and doping which we attribute to a rearrangement of the orbital occupation.