ANISOTROPY IN THE ELECTRON MOBILITY OF SINGLE CADMIUM SULFIDE CRYSTALS AT LOW TEMPERATURES
Abstract
The possibility of the existence of a measurable anisotropy in the electron mobility of CdS was investigated between 8 and 293 K, using crossshaped, bulk si gle crystals. The mobility mAT EACH TEMPERATURE WAS OBTAINED FROM THE RELATION M = E sub y/E sub x B where E sub y is the Hall field, E sub x the crystal field, and B the magnetic field. Dy amic measurements leading to the calculated mobilities between 8 and 293 K were made in a liquid helium cryostat. A potentiome ric, multi-channel recorder was used to record all electrical measurements. The current was directed parallel to the c-axis of the crystal in one test; the contacts and leads were then reoriented at a 90 egree angle, and the current was directed perpendicular to the c-a is. The electron mobility was plot ed as a function of 1/T between 8 and 293 K . Analysis indicates that measurable anisotropy does exist, and that a reversal occurs at about 30 K. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1962
- Accession Number
- AD0283953
Entities
People
- Harry C. Goodson
Organizations
- Air Force Institute of Technology