Synthesis and Properties of Narrow-Band Materials

窄带材料的合成与性能

• 批准号: 9818331
• 负责人: John Goodenough
• 金额: $ 45万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-02-01 至 2002-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9818331&HistoricalAwards=false
• 关键词: Synthesis; Properties; Narrow; Band; Materials

9818331GoodenoughThe objective of this research is to clarify the mechanisms responsible for a variety of physical properties exhibited by transition-metal oxides. Examples include complex electronic transitions of perovskite type oxides correlated with their magnetic properties. At the present time, solid state theory is unable to account for such properties as the high-temperature superconductivity of the copper oxides or the colossal intrinsic magnetoresistance of the manganese-oxide perovskites. These studies will aim to fill a gap in our understanding essential for theoretical development needed for the design of new classes of materials.%%%Because they exhibit properties such as high-temperature superconductivity, colossal magnetoresistance, and thermoelectric behavior, transition metal oxides constitute one of the most important and interesting classes of materials with respect to their potential for technological applications. Studying the relation of chemistry and crystal structure to the physical properties of these solids will aid the development of theory important to the design of a new and improved engineering materials.***

9818331Goodenough本研究的目的是阐明过渡金属氧化物所表现出的各种物理性质的机制。 例子包括与其磁性相关的钙钛矿型氧化物的复杂电子跃迁。 目前，固态理论无法解释铜氧化物的高温超导性或锰氧化物钙钛矿的巨大固有磁阻等性质。 这些研究旨在填补我们对设计新材料类别所需的理论发展的理解上的空白。%由于它们表现出高温超导性，巨磁阻和热电行为等特性，过渡金属氧化物就其技术应用潜力而言构成了最重要和最有趣的一类材料。 研究这些固体的化学和晶体结构与物理性质之间的关系，将有助于发展对设计新的和改进的工程材料至关重要的理论。