Evidence for charge orbital and spin stripe order in an overdoped manganite

TL;DR

This study provides diffraction evidence of complex charge, orbital, and spin stripe orders in an overdoped manganite, revealing a coupled incommensurate and commensurate superstructure with stripe arrangements.

Contribution

First demonstration of coupled charge, orbital, and spin stripe order in an overdoped manganite using neutron diffraction.

Findings

Identification of three incommensurate and one commensurate order parameters

Evidence of stripe arrangement with ferromagnetic zigzag chains disrupted by Mn4+ stripes

Coupled ordering of charges, orbitals, and spins in the material

Abstract

We present diffraction data on a single-layered manganite La(0.42)Sr(1.58)MnO4 with hole doping (x>0.5). Overdoped La(0.42)Sr(1.58)MnO4 exhibits a complex ordering of charges, orbitals and spins. Single crystal neutron diffraction experiments reveal three incommensurate and one commensurate order parameters to be tightly coupled. The position and the shape of the distinct superstructure scattering points to a stripe arrangement in which ferromagnetic zigzag chains are disrupted by additional Mn4+ stripes.