GOALI: Pulsed Terahertz Spectroscopy of Colossal Magnetoresistance Materials

9712776 DREW这个实验研究项目由MPS理事会多学科事务办公室部分支持，研究巨磁电阻材料的红外和微波磁光特性，重点是在远红外透明衬底上生长的薄膜形式的锰钙钛矿。薄膜将使用直流传输和磁化率测量进行表征，然后将使用太赫兹光谱进行研究。这一结果将有助于阐明锰钙钛矿中CMR的机制，并解决这些材料在微波电路元件、测辐射热计探测器和磁性传感器等方面的应用问题。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。这个实验研究项目由MPS董事会多学科事务办公室(OMA)部分支持，利用复杂的光学测量来阐明磁场与锰钙钛矿家族的“巨磁电阻材料”(CMR)的相互作用。这些CMR材料对环境磁场的电阻具有极大的敏感性，因此它们在磁盘驱动器中使用的磁场传感元件中的潜在应用以及它们的科学价值引起了极大的兴趣。这项研究的结果可能包括不同寻常的新效应或结构，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. ***