Defect Engineering of Spin Polarized Transparent Conductors through Complex Oxide Epitaxy
Abstract
The main research objective of the proposed program is to develop a new class of spin polarized transparent conductors through cation defect ordering in epitaxial stannate oxide thin films. At a fundamental level, these efforts will enable us (i) to develop an understanding of charge transport in these transparent conductors, (ii) to address some long standing controversial claims as to the origin of ferromagnetism in transparent oxides as well as (iii) to explore the feasibility of materials design through cation defect ordering. In order to develop a new class of transparent spin polarized conductors in stannate-based perovskite thin films, we will combine our expertise in atomic scale thin film synthesis and in the fabrication and characterization of junction devices to design and synthesize doped stannate thin film materials with optical transparency, metallic conductivity and magnetism. Our technical approach includes: the design and synthesis of stannate based spin polarized transparent conductors; the local structural, electronic and magnetic characterization via x-ray absorption spectroscopy, x-ray magnetic circular dichroism, photoemission electron microscopy, x-ray resonant magnetic scattering, magnetic force microscopy, transmission electron microscopy and electron energy loss spectroscopy; magnetic characterization of epitaxial doped stannate thin films; electronic characterization of epitaxial doped stannate thin films. Accomplishments: In this three-year program, we have developed a new family of magnetically doped barium stannate epitaxial thin films that exhibit a combination of metallic conductivity, optical transparency and magnetism. In contrast to bulk samples which are grown under equilibrium conditions, epitaxial thin films grown via nonequilibrium processes should enable the incorporation of more magnetic dopants than otherwise possible with equilibrium processes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 2017
- Accession Number
- AD1070599
Entities
People
- Yuri Suzuki
Organizations
- Stanford University