Developing novel lead-free ferroelectric materials is crucial for next-generationmicroelectronic technologies that are energy efficient and environmentfriendly.However,materials discovery and property optimization are...Developing novel lead-free ferroelectric materials is crucial for next-generationmicroelectronic technologies that are energy efficient and environmentfriendly.However,materials discovery and property optimization are typicallytime-consuming due to the limited throughput of traditional synthesismethods.In this work,we use a high-throughput combinatorial synthesisapproach to fabricate lead-free ferroelectric superlattices and solid solutions of(Ba_(0.7)Ca_(0.3))TiO_(3)(BCT)and Ba(Zr_(0.2)Ti_(0.8))O_(3)(BZT)phases with continuous variationof composition and layer thickness.High-resolution x-ray diffraction(XRD)and analytical scanning transmission electron microscopy(STEM)demonstratehigh film quality and well-controlled compositional gradients.Ferroelectricand dielectric property measurements identify the“optimal propertypoint”achieved at the composition of 48BZT–52BCT.Displacement vectormaps reveal that ferroelectric domain sizes are tunable by varying{BCT–BZT}Nsuperlattice geometry.This high-throughput synthesis approach can be appliedto many other material systems to expedite new materials discovery and properties optimization,allowing for the exploration of a large area of phasespace within a single growth.展开更多
基金NNSA's Laboratory Directed Research andDevelopment ProgramCenter forIntegrated Nanotechnologies,an Office ofScience User Facility operated for theU.S.Department of Energy(DOE)Officeof Science by Los Alamos NationalLaboratory,Grant/Award Number:89233218CNA000001+5 种基金Sandia NationalLaboratories,Grant/Award Number:DENA0003525U.S.Department of Energy,Office of Science,Basic Energy Sciences,Materials Science and EngineeringDivisionArgonne National LaboratoryU.S.DOE Office of Science-Basic Energy Sciences,Grant/Award Number:DEAC02-06CH11357Center for NanophaseMaterials SciencesACS PetroleumResearch Fund under Doctoral NewInvestigator Grant,Grant/Award Number:62603-DNI10。
文摘Developing novel lead-free ferroelectric materials is crucial for next-generationmicroelectronic technologies that are energy efficient and environmentfriendly.However,materials discovery and property optimization are typicallytime-consuming due to the limited throughput of traditional synthesismethods.In this work,we use a high-throughput combinatorial synthesisapproach to fabricate lead-free ferroelectric superlattices and solid solutions of(Ba_(0.7)Ca_(0.3))TiO_(3)(BCT)and Ba(Zr_(0.2)Ti_(0.8))O_(3)(BZT)phases with continuous variationof composition and layer thickness.High-resolution x-ray diffraction(XRD)and analytical scanning transmission electron microscopy(STEM)demonstratehigh film quality and well-controlled compositional gradients.Ferroelectricand dielectric property measurements identify the“optimal propertypoint”achieved at the composition of 48BZT–52BCT.Displacement vectormaps reveal that ferroelectric domain sizes are tunable by varying{BCT–BZT}Nsuperlattice geometry.This high-throughput synthesis approach can be appliedto many other material systems to expedite new materials discovery and properties optimization,allowing for the exploration of a large area of phasespace within a single growth.
