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Size-Induced Ferroelectricity in Antiferroelectric Oxide Membranes

机译:Size-Induced Ferroelectricity in Antiferroelectric Oxide Membranes

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摘要

Despite extensive studies on size effects in ferroelectrics, how structures andproperties evolve in antiferroelectrics with reduced dimensions still remainselusive. Given the enormous potential of utilizing antiferroelectrics for highenergy-density storage applications, understanding their size effects willprovide key information for optimizing device performances at small scales.Here, the fundamental intrinsic size dependence of antiferroelectricity in leadfreeNaNbO_3 membranes is investigated. Via a wide range of experimentaland theoretical approaches, an intriguing antiferroelectric-to-ferroelectric transitionupon reducing membrane thickness is probed. This size effect leadsto a ferroelectric single-phase below 40 nm, as well as a mixed-phase statewith ferroelectric and antiferroelectric orders coexisting above this criticalthickness. Furthermore, it is shown that the antiferroelectric and ferroelectricorders are electrically switchable. First-principle calculations further revealthat the observed transition is driven by the structural distortion arising fromthe membrane surface. This work provides direct experimental evidence forintrinsic size-driven scaling in antiferroelectrics and demonstrates enormouspotential of utilizing size effects to drive emergent properties in environmentallybenign lead-free oxides with the membrane platform.

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  • 来源
    《Advanced Materials》 |2023年第17期|2210562.1-2210562.12|共12页
  • 作者单位

    Department of Applied PhysicsStanford UniversityStanford, CA 94305, USA,Stanford Institute for Materials and Energy SciencesSLAC National Accelerator LaboratoryMenlo Park, CA 94025, USA,Department of Materials Science and EngineeringNorth Carolina State U;

    Department of Applied PhysicsStanford UniversityStanford, CA 94305, USA,Stanford Institute for Materials and Energy SciencesSLAC National Accelerator LaboratoryMenlo Park, CA 94025, USA;

    Stanford Institute for Materials and Energy SciencesSLAC National Accelerator LaboratoryMenlo Park, CA 94025, USA,Department of PhysicsStanford UniversityStanford, CA 94305, USACEMESUniversité de ToulouseCNRSUPS, 29 rue Jeanne Marvig F-31055, Toulouse, FrancePhysics Department and Institute for Nanoscience and EngineeringUniversity of ArkansasFayetteville, AR 72701, USAMaterials Science DivisionArgonne National LaboratoryLemont, IL 60439, USADepartment of Applied and Engineering PhysicsCornell UniversityIthaca, NY 14853, USADepartment of Materials Science and EngineeringUniversity of CaliforniaBerkeley, Berkeley, CA 94720, USADepartment of Materials Science and EngineeringUniversity of CaliforniaBerkeley, Berkeley, CA 94720, USA,School of EngineeringBrown UniversityProvidence, RI 02912, USAStanford Institute for Materials and Energy SciencesSLAC National Accelerator LaboratoryMenlo Park, CA 94025, USAStanford Institute for Materials and Energy SciencesSLAC National Accelerator LaboratoryMenlo Park, CA 94025, USA,Department of Applied PhysicsStanford UniversityStanford, CA 94305, USAMaterials Sciences DivisionLawrence Berkeley National LaboratoryBerkeley, CA 94720, USADepartment of Materials Science and EngineeringStanford UniversityStanford, CA 94305, USADepartment of Materials Science and EngineeringNorth Carolina State UniversityRaleigh, NC 27606, USAThe Molecular FoundryLawrence Berkeley National Laboratory1 Cyclotron Road, Berkeley, CA 94720, USADepartment of Mechanical EngineeringStanford UniversityStanford, CA 94305, USAX-ray Science DivisionAdvanced Photon SourceArgonne National LaboratoryLemont, IL 60439, USADepartment of Materials Science and NanoengineeringDepartment of Physics and AstronomyRice UniversityHouston, TX 77251, USA;

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  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类
  • 关键词

    antiferroelectric materials; membranes; phase transition; size effects; sodium niobate;

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