GOALI: Pulsed Terahertz Spectroscopy of Colossal Magnetoresistance Materials

这个实验性的GOALI研究项目，部分由MPS理事会的多学科事务办公室（OMA）支持，是关于巨大磁阻（CMR）材料的红外和微波磁光特性，重点是锰钙钛矿，以薄膜的形式生长在远红外透明衬底上。薄膜将使用直流输运和磁化率测量进行表征，然后使用太赫兹光谱进行研究。这些结果将用于帮助阐明锰钙钛矿中CMR的机制，并解决有关该材料作为微波电路元件、热测量探测器和磁传感器应用的问题。这项研究项目是跨学科的，将涉及一个领先的学术实验室和一个政府实验室之间的合作。这个实验性的GOALI研究项目，部分由MPS理事会的多学科事务办公室（OMA）支持，利用复杂的光学测量来澄清磁场与锰钙钛矿家族的“巨磁阻材料”（CMR）的相互作用。这些CMR材料对环境磁场的电阻具有极高的灵敏度，因此对其在磁盘驱动器中使用的磁场传感元件的潜在应用以及它们的科学兴趣非常感兴趣。这项研究的结果可能包括不同寻常的新效果或结构，可能会在技术上得到应用。这项研究项目是跨学科的，将涉及一个领先的学术实验室和一个政府实验室之间的合作。＊＊＊

w:\awards\awards96\num.doc 9712776 Drew This experimental GOALI research project, supported in part by the Office of Multidisciplinary Affairs (OMA) of the MPS Directorate, is on the infrared and microwave magneto-optical properties of Colossal Magnetoresistance (CMR) materials, with emphasis on manganese perovskites, in the form of thin films grown on far-infrared transparent substrates. The films will be characterized using dc transport and magnetic susceptibility measurements, and will then be studied using THz spectroscopy. The results will be used to help illuminate the mechanisms involved in CMR in the manganese perovskites and address questions about the application of the materials as microwave circuit elements, bolometric detectors, and magnetic sensors. This research project is interdisciplinary in nature and will involve collaboration between a leading academic laboratory and a government laboratory. %%% This experimental GOALI research project, supported in part by the Office of Multidisciplinary Affairs (OMA) of the MPS Directorate makes use of sophisticated optical measurements to clarify the interaction of magnetic fields with "Colossal Magnetoresistance Materials" (CMR) of the manganese perovskite family. These CMR materials have extremely large sensitivity in their electrical resistance to ambient magnetic field, and are therefore of great interest for their potential application in magnetic field sensing elements as are used in magnetic disk drives, as well as for their scientific interest. Results from this research may include unusual new effects or structures which may find application in technology. This research project is interdisciplinary in nature and will involve collaboration between a leading academic laboratory and a government laboratory. ***