Proposal to Purchase a SQUID magnetometer

购买 SQUID 磁力计的提案

• 批准号: 0234886
• 负责人: Larry Taylor
• 金额: $ 16.01万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0234886&HistoricalAwards=false
• 关键词: Proposal; Purchase; SQUID; magnetometer

With this award from the Chemistry Research Instrumentation and Facilities (CRIF) Program, the Department of Chemistry at Virginia Polytechnic Institute and State University will acquire a Superconducting Quantum Interface Device (SQUID) magnetometer. This equipment will enable researchers to carry out studies on a) synthesis and characterization of molecule-based magnets; b) magnetic targeting of drugs in vivo; c) development of ferromagnetic, ferroelectric and ferroelastic materials; d) properties of alkyl-substituted metallocenes and indacenes; and e) the synthesis of stable and persistent organic radicals that are capable of chelating transition metals. A SQUID magnetometer is critical for studying the magnetic properties of materials, particularly for weakly magnetic/small moment samples. In a DC magnetization measurement, one measures the magnetic moment as a function of applied DC magnetic field (and/or temperature). Using DC magnetization experiments, one can determine magnetic moments or a hysteresis curve, or identify magnetic phase transitions. In such a fashion, complete magnetic characterization of single crystal samples and films is possible. These types of measurements are essential in order to understand polymers and thin films.

在化学研究仪器和设施(CRIF)计划的这一奖项下，弗吉尼亚理工学院和州立大学的化学系将获得一台超导量子接口器件(SQUID)磁强计。该设备将使研究人员能够开展以下研究：a)分子磁体的合成和表征；b)体内药物的磁靶向；c)铁磁性、铁电性和铁弹性材料的开发；d)烷基取代茂金属和吲哚的性质；以及e)能够螯合过渡金属的稳定和持久的有机自由基的合成。SQUID磁强计对于研究材料的磁性是至关重要的，特别是对于弱磁性/小磁矩样品。在直流磁化测量中，测量作为外加直流磁场(和/或温度)的函数的磁矩。使用直流磁化实验，可以确定磁矩或磁滞曲线，或识别磁性相变。以这种方式，可以对单晶样品和薄膜进行完整的磁性表征。这些类型的测量对于了解聚合物和薄膜是必不可少的。