Accession Number : AD0283953

Title :   ANISOTROPY IN THE ELECTRON MOBILITY OF SINGLE CADMIUM SULFIDE CRYSTALS AT LOW TEMPERATURES

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : GOODSON,HARRY C.

Report Date : MAY 1962

Pagination or Media Count : 1

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)

Descriptors :   *CADMIUM COMPOUNDS, *ELECTRONS, *SINGLE CRYSTALS, *SULFIDES, ANISOTROPY, CRYSTAL STRUCTURE, ELECTRICAL CONDUCTIVITY, ELECTRICAL PROPERTIES, HALL EFFECT, LABORATORY EQUIPMENT, LOW TEMPERATURE RESEARCH, PREPARATION, RESISTANCE (ELECTRICAL), SEMICONDUCTORS, SOLID STATE PHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE