Development of in-situ Ultraviolet / X-ray Photoelectron Spectroscopy System for Heterostructures and Superlattices with Pseudo-perovskite Oxides Deposited by Pulsed Laser Deposition

Multi-functional oxides in particular ferroelectric and ferromagnetic multiferroic and magnetoelectric materials have been energetically investigated recently. To understand the electronic structures and magnetic ordering information in the multi-functional oxide films and heterostructures, we developed the in-situ ultraviolet/x-ray photoelectron spectroscopy (UV/XPS) system, which was connected to pulsed laser deposition system directly via a transfer chamber kept under ultra-high vacuum condition. It mainly consisted of a high resolution electron analyzer VG Scienta R4000 with 2-dimentional spin detector, a high intensity ultraviolet source and a dual Al/Mg x-ray tube as the alternative excitations. As an example, thickness-dependent electronic and spin structures in pseudo-perovskite oxide films deposited on SrTiO3 (100) substrates will be studied by in-situ UPS/XPS.