Determination of surface and interface magnetic properties for the multiferroic heterostructure Co/BaTiO3 using SPLEED and ARPES

TL;DR

This study investigates the surface and interface magnetic properties of a Co/BaTiO3 heterostructure using surface-sensitive techniques, revealing how polarization changes influence electronic structure and magnetic characteristics.

Contribution

It provides the first combined experimental and theoretical analysis of magnetic and electronic properties of 3 ML Co/BaTiO3 using SPLEED and ARPES methods.

Findings

Polarization affects electronic structure signatures.

Magnetic properties characterized by spin-polarized electron diffraction.

Spectral changes linked to BaTiO3 polarization states.

Abstract

Co/BaTiO$_3$(001) is one of the most interesting multiferroic heterostructures as it combines different ferroic phases, setting this way the fundamentals for innovative technical applications. Various theoretical approaches have been applied to investigate the electronic and magnetic properties of Co/BaTiO$_3$(001). Here we determine the magnetic properties of 3 ML Co/BaTiO$_3$ by calculating spin-polarized electron diffraction as well as angle-resolved photoemission spectra, with both methods being well established as surface sensitive techniques. Furthermore, we discuss the impact of altering the BaTiO$_3$ polarization on the spectra and ascribe the observed changes to characteristic details of the electronic structure.