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Title:A magnetic resonance study of iron in silver chloride
Author(s):Garth, John Campbell
Doctoral Committee Chair(s):Slichter, C.P.; Slichter, C.P.
Department / Program:Physics
Subject(s):magnetic resonance
silver chloride
cubic electric spin resonance spectrum
Electron Nuclear Double Resonance (ENDOR) technique
Abstract:Th.e cubic electron spin resonance spectrum of Fe3+ in silver chloride has been studied at 1.3°K by the Electron Nuclear Double Resonance (ENDOR) technique. ENDOR lines from 6 to 24 megacycles were observed on each of the five electron spin resonance transitions and have been identified as lines due to four chlorine nuclei which are nearest neighbors to the iron ion. The angular dependence of the crystal field splitting of the electron resonance, as the orientation of the applied field is varied, proves that the iron is in a site of cubic symmetry. The an~ular variation of the ENDOR spectrum, as the~ield is rotated in a (100) plane, shows that the iron cannot be in a site of octahedral symmetry and that it therefore must be in a site of tetrahedral symmetry. ENDOR lines of both chlorine isotopes were identified. C135 ENDOR lines, characterized by Ms = +3/2 and Ms = -3/2 0 were studied with the applied field parallel to the (100) direction, and the best chlorine hyperfine and quadrupole coupling .constants were determined for both isotopes. It is found that these constants can be used to predict the locations'of all observed C135 and C137 ENDOR lines, but some discrepancies between the predicted spectrum and the observed lines remain which cannot be accounted for by effects of the cubic field splitting term in the spin- Hamiltonian.
Issue Date:1965
Genre:Dissertation / Thesis
Rights Information:1965 John Campbell Garth
Date Available in IDEALS:2011-05-19
Identifier in Online Catalog:6195869

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