关键词：传感器；磁探测器
摘 要：SRI International, in collaboration with Professor Jing Shih of the University of California-Riverside (UCR), Professor Nathan Newman of Arizona State University (ASU), and Professor Edmond Nowak of the University of Delaware (UD), has been funded (from June 2009 through September 2012) through ONR Contract (N00014-09-C-0292) to fabricate a magnetic sensor with a half-metallic ferromagnet (FM) contact and polymers and demonstrate its sensing capability. In this study we considered La0.7Sr0..3MnO3 (LSMO) and CoFe50Al25Si25 (CFAS) alloys for half-metallic FM contacts and poly(3,4-ethylenedioxythiophene) (PEDOT ) and poly- 3(hexylthiophene) (P3HT) for polymers. Room temperature operation of this ultrasensitive device requires half-metallic ferromagnetic contacts with high Curie temperature (Tc), ultra-lowmobility polymer with very high doping density, nano-scale trenches, successful charge and spin injection into polymers from FM half-metal contacts, and spin precession in polymers. The FM films for vertical and lateral devices were grown at UCR and ASU, respectively. Most device fabrication was carried out at SRI, while magnetic and noise measurements were performed at ASU and UD.