Fluorite-Structured Oxides: A New Class of Multifunctional Materials
Abstract
The objective of the proposal is to develop fundamental understanding of the stability and crystallography of recently observed ferroelectric phases (acentric/polar phases) in fluorite structured oxides such as HfO2. The Pl proposed an integrated, iterative experimental and modeling effort to achieve the objectives of the proposal. He put together a team of experts in various fields such as modeling, thin film growth, bulk materials processing, structural and fenoelectric characterization etc. to add:ess fundamental science underpinning the stability and c1ystallography ofacentric/polar phases of fluorite oxides (e.g. HfO2). Specifically the team proposed to utilize DFT and beyond DFT computations to shed light on the atomic origins ofmultifonctional (piezoelectricity, pyroelectricity and ferroelectricity) behavior of doped HfO2 materials. The team will process (with the theory guidance) doped bulk/powder HtO2 samples by solid state synthesis, and thin films by ALD and sputtering techniques. The effects of dopants such as Si, Al, Zr, Sr, La and Gd etc. will be explored. Properties of the samples will be determined by using a suite of thermal and structural/electrical property measurements techniques (such as grazing angle x-ray diffraction, pressure dependent XRD, piezo-force microscopy etc.) to conelate properties with the structure and validate the structure of the phases predicted by computations.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 12, 2017
- Source ID
- W911NF1510593
Entities
People
- Jacob L. Jones
Organizations
- Army Contracting Command
- North Carolina State University
- United States Army