Accession Number : AD0855124

Title :   Temperature and Frequency Dependence of Nuclear Spin-Lattice Relaxation in Single Crystals of Cadmium Selenide.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Cage, Allan Leo

Report Date : MAR 1969

Pagination or Media Count : 59

Abstract : The nuclear magnetic spin-relaxation time of Cd113 in n-type bulk single crystals of undoped CdSe, and CdSe:Li,Fe was determined as a function of temperature, 77 degrees K to 523 degrees K, and frequency, 2 MHz to 10 MHz. A direct method was used on a continuous-wave wide-line spectrometer. Relaxation in the undoped crystal is attributed to fixed paramagnetic impurities at both high and low temperatures, although different donor levels are responsible. In the middle temperature region this mechanism is probably modulated by electron hopping. The data obtained on the doped crystal were inconclusive and no relaxation mechanism could be positively identified. (Author)

Descriptors :   *NUCLEAR MAGNETIC RESONANCE), (*CADMIUM SELENIDES, SEMICONDUCTORS, HALL EFFECT, NUCLEAR SPINS, CRYSTAL LATTICES, MEDIUM FREQUENCY, HIGH FREQUENCY, CRYOGENICS, DOPING, THESES.

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE