Research on magnetic materials of interest in transportation

Details

• Creators:
  Oliver, Frederick W.
• Corporate Creators:
  National Transportation Center (U.S.)
• Corporate Contributors:
  United States. Department of Transportation. Research and Special Programs Administration
• Subject/TRT Terms:
  • Magnetic materials
  • Barriers (Roads)
  • Chemical compounds
  • Gates
  • Magnets
  • Materials by end use
  • Roads
  • Sensors
  • Smart cards
  • Vehicles
  More +
• Publication/ Report Number:
  NTIS-PB2000105181
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  National Transportation Center (U.S.)
• Abstract:
  This paper reports the results of an investigation on magnetic materials of interest in the transportation field. It includes information about the present state of magnetic materials and examines the recently discovered phenomenon referred to as colossal magnetoresistance (CMR). Magnetic materials are used directly as magnets in various applications in transportation vehicles, barrier gates, smart cards, and road sensors. For CMR materials to replace the materials referred to as giant magnetoresistance (GMR), it will be necessary to identify a CMR material that undergoes transition into a metallic state with a smaller external magnetic field at room temperature. Calculations were performed and experiments were done that allow the prediction of where the magnetic transition should occur. The author's studies indicate that a compound consisting of lanthanum, manganese, oxygen, and strontium (La-Mn-O-Sr) should be a prime candidate for potential applications in transportation.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/15352/dot_15352_DS1.pdf
• File Type:
  [PDF - 1.05 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:95467339fba8a29d114cc01d270b9cf4a266bebef9d0a737b9182d0b48a1e9813ed694c73db6aa062e5673235f8baf37fd9abcbdcdf6e0843e2c4c95ac9f98d2