Accession Number : ADA182666

Title :   Nuclear Magnetic Resonance in Gallium Arsenide.

Descriptive Note : Final rept. 1986-1987,

Corporate Author : NAVAL ACADEMY ANNAPOLIS MD

Personal Author(s) : Finch,Michael F

PDF Url : ADA182666

Report Date : 19 May 1987

Pagination or Media Count : 44

Abstract : Nuclear Magnetic Resonance (NMR) lineshapes of 69Ga in GaAs:In were studied for two different levels of indium dopant. The lineshapes were developed by fourier analysis of the spin echoes. First order quadrupole effects manifested themselves as wings in the lineshapes. As expected the wings were larger in the more heavily doped sample. The dependence of the second moment of the lineshapes on the orientation of the crystal in the field supports a continuous solid model of the strain, in which the strain attenuates as the cube of the distance from the impurity site. Because of noise levels the model can only be confirmed for distances greater than 10A from the impurity, and no determination of the strain on the first through eighth shells surrounding the impurity can be made. Keywords: Gallium Arsenide semiconductors, Semiconductors, Nuclear magnetic resonance spectroscopy, Spectroscopy.

Descriptors :   *GALLIUM ARSENIDES, *SEMICONDUCTORS, *NUCLEAR MAGNETIC RESONANCE, *NUCLEAR RADIATION SPECTROSCOPY, MODELS, SOLIDS, QUADRUPOLE MOMENT, IMPURITIES, SITES, SPECTROSCOPY, FOURIER ANALYSIS, NOISE, CRYSTALS, ORIENTATION(DIRECTION), ECHOES, SPINNING(MOTION), DOPING, DIPOLE MOMENTS, INDIUM COMPOUNDS, AXIAL FLOW, CHEMICAL BONDS, MOLECULAR STRUCTURE, WINGS

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE