Design, synthesis and characterization of multi-ferroic materials- from inhomogeneous nanostructure to functional macroscopic properties

多铁性材料的设计、合成和表征——从不均匀纳米结构到功能宏观特性

• 批准号: 349693-2007
• 负责人: Ye, ZuoGuang
• 金额: $ 2.91万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Accelerator Supplements
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=431061
• 关键词: Design; synthesis; characterization; multi; ferroic

This proposal describes a comprehensive research program on the design, synthesis and characterization of an important class of inorganic functional materials, the (multi-)ferroic materials, including piezoelectrics/ferroelectrics (with electromechanical coupling and switchable polarization), ferromagnetics (with switchable magnetization), ferroelastics (with switchable strain/deformation), and ferro-magnetoelectrics (with simultaneous and coupling polarization and magnetization). These materials are useful in a vast range of industrial or commercial applications, e.g. as nonvolatile random-access memory devices in future computers, 'smart' sensors and actuators for active control of vibration or noise, high-resolution ultrasonic probes for medical imaging, diagnosing and treatment, and micro-electromechanical systems (MEMS). The ferroic and multi-ferroic properties essential to these applications result from the microscopic and nanoscopic crystal chemistry of materials, i.e. the nature of constituent ions and chemical bonding, the atomic and spin arrangements (nuclear and magnetic structures), and the related phase components and transitions. Therefore, understanding the relationship between micro-/nanoscopic structure and macroscopic functional properties is central to the ferroic materials research, and it is along this line that our research program is established.

这项建议描述了一类重要的无机功能材料的设计、合成和表征的综合研究计划，即(多)铁性材料，包括压电性/铁电性(具有机电耦合和可切换极化)、铁磁性(具有可切换磁化)、铁弹性(具有可切换应变/变形)和铁磁电性(具有同时和耦合极化和磁化)。这些材料可用于广泛的工业或商业应用，例如未来计算机中的非易失性随机存取存储器件、用于振动或噪声主动控制的“智能”传感器和执行器、用于医学成像、诊断和治疗的高分辨率超声探头，以及微电子机械系统(MEMS)。对这些应用至关重要的铁性和多铁性来自材料的微观和纳米晶体化学，即组成离子和化学键的性质，原子和自旋排列(核和磁结构)，以及相关的相成分和相变。因此，了解微纳米结构与宏观功能性质之间的关系是铁基材料研究的核心，也正是沿着这条主线，我们的研究计划才得以确立。