German Conference for Research with Synchrotron Radiation, Neutrons and Ion Beams at Large Facilities

Voltage control of magnetism in oxide heterostructures: Neutron & X-ray and electron microscopy investigation

18 Sept 2018, 16:00

1h 30m

Fakultät für Maschinenwesen der Technischen Universität München

Poster P5 Thin films, 2D materials and surfaces Poster session 2

Speaker

Ms Tanvi Bhatnagar (Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS-2) and Peter Grünberg Institut (PGI-4), JARA-FIT, 52425 Jülich, Germany )

Description

Voltage control of magnetism (VCM) in oxide heterostructures, such as La1-x SrxMnO3/BaTiO3 is of considerable interest due to the strong coupling between lattice, charge, spin and orbital degrees of freedom at interfaces, as well as for improving the functionality of future spintronic devices. In this study, the manipulation of magnetization via switching of ferroelectric polarization at interfaces as a function of electric field is investigated. We make use of a combination of advanced scattering (neutron and X-ray) methods, electron microscopy and spectroscopy (including off-axis electron holography and electron magnetic circular dichroism). Various mechanisms are involved in VCM, such as carrier modulation, strain effect, exchange coupling and orbital reconstruction. The role of each mechanism in the mediation of VCM in oxide heterostructures will be discussed.